diff --git a/chrome/locale/af-ZA/zotero/zotero.dtd b/chrome/locale/af-ZA/zotero/zotero.dtd
index 5a8ea6c2b..ec597e818 100644
--- a/chrome/locale/af-ZA/zotero/zotero.dtd
+++ b/chrome/locale/af-ZA/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "Date Added">
 <!ENTITY zotero.items.dateModified_column "Date Modified">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Show in Library">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/ar/zotero/zotero.dtd b/chrome/locale/ar/zotero/zotero.dtd
index bd136173d..08e22da57 100644
--- a/chrome/locale/ar/zotero/zotero.dtd
+++ b/chrome/locale/ar/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "الملكية الفكرية">
 <!ENTITY zotero.items.dateAdded_column "تاريخ الإضافة">
 <!ENTITY zotero.items.dateModified_column "تاريخ التعديل">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "عرض في المكتبة">
 <!ENTITY zotero.items.menu.attach.note "اضافة ملاحظة">
diff --git a/chrome/locale/bg-BG/zotero/zotero.dtd b/chrome/locale/bg-BG/zotero/zotero.dtd
index ca90e6992..233660bf4 100644
--- a/chrome/locale/bg-BG/zotero/zotero.dtd
+++ b/chrome/locale/bg-BG/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Права">
 <!ENTITY zotero.items.dateAdded_column "Добавен на">
 <!ENTITY zotero.items.dateModified_column "Променен на">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Показва в библиотеката">
 <!ENTITY zotero.items.menu.attach.note "Добавя Бележка">
diff --git a/chrome/locale/ca-AD/zotero/zotero.dtd b/chrome/locale/ca-AD/zotero/zotero.dtd
index b9a3b0fea..d3776fa22 100644
--- a/chrome/locale/ca-AD/zotero/zotero.dtd
+++ b/chrome/locale/ca-AD/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Drets">
 <!ENTITY zotero.items.dateAdded_column "Data d&apos;incorporació">
 <!ENTITY zotero.items.dateModified_column "Data de modificació">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Mostra a la Biblioteca">
 <!ENTITY zotero.items.menu.attach.note "Afegeix nota">
diff --git a/chrome/locale/cs-CZ/zotero/zotero.dtd b/chrome/locale/cs-CZ/zotero/zotero.dtd
index 8ff1da509..9ff66a5a7 100644
--- a/chrome/locale/cs-CZ/zotero/zotero.dtd
+++ b/chrome/locale/cs-CZ/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Práva">
 <!ENTITY zotero.items.dateAdded_column "Přidáno dne">
 <!ENTITY zotero.items.dateModified_column "Upraveno dne">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Ukázat v knihovně">
 <!ENTITY zotero.items.menu.attach.note "Přidat poznámku">
diff --git a/chrome/locale/da-DK/zotero/zotero.dtd b/chrome/locale/da-DK/zotero/zotero.dtd
index ec5997681..cef0dc496 100644
--- a/chrome/locale/da-DK/zotero/zotero.dtd
+++ b/chrome/locale/da-DK/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "Date Added">
 <!ENTITY zotero.items.dateModified_column "Date Modified">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Show in Library">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/de/zotero/zotero.dtd b/chrome/locale/de/zotero/zotero.dtd
index 932bb5afe..b1213ead6 100644
--- a/chrome/locale/de/zotero/zotero.dtd
+++ b/chrome/locale/de/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rechte">
 <!ENTITY zotero.items.dateAdded_column "hinzugefügt am">
 <!ENTITY zotero.items.dateModified_column "geändert am">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "In Bibliothek anzeigen">
 <!ENTITY zotero.items.menu.attach.note "Notiz hinzufügen">
diff --git a/chrome/locale/el-GR/zotero/zotero.dtd b/chrome/locale/el-GR/zotero/zotero.dtd
index 5a8ea6c2b..ec597e818 100644
--- a/chrome/locale/el-GR/zotero/zotero.dtd
+++ b/chrome/locale/el-GR/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "Date Added">
 <!ENTITY zotero.items.dateModified_column "Date Modified">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Show in Library">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/en-US/zotero/zotero.dtd b/chrome/locale/en-US/zotero/zotero.dtd
index ae7cf602d..19ce02bb7 100644
--- a/chrome/locale/en-US/zotero/zotero.dtd
+++ b/chrome/locale/en-US/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column						"Rights">
 <!ENTITY zotero.items.dateAdded_column					"Date Added">
 <!ENTITY zotero.items.dateModified_column				"Date Modified">
-<!ENTITY zotero.items.numChildren_column				"+">
 
 <!ENTITY zotero.items.menu.showInLibrary					"Show in Library">
 <!ENTITY zotero.items.menu.attach.note					"Add Note">
diff --git a/chrome/locale/es-ES/zotero/zotero.dtd b/chrome/locale/es-ES/zotero/zotero.dtd
index ab686e160..9f6c7e920 100644
--- a/chrome/locale/es-ES/zotero/zotero.dtd
+++ b/chrome/locale/es-ES/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Derechos">
 <!ENTITY zotero.items.dateAdded_column "Fecha de adición">
 <!ENTITY zotero.items.dateModified_column "Fecha de modificación">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Mostrar en la biblioteca">
 <!ENTITY zotero.items.menu.attach.note "Añadir nota">
diff --git a/chrome/locale/et-EE/zotero/zotero.dtd b/chrome/locale/et-EE/zotero/zotero.dtd
index 7ebe847a4..810add797 100644
--- a/chrome/locale/et-EE/zotero/zotero.dtd
+++ b/chrome/locale/et-EE/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Õigused">
 <!ENTITY zotero.items.dateAdded_column "Lisamise kuupäev">
 <!ENTITY zotero.items.dateModified_column "Muutmise kuupäev">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Näidata raamatukogus">
 <!ENTITY zotero.items.menu.attach.note "Märkuse lisamine">
diff --git a/chrome/locale/eu-ES/zotero/zotero.dtd b/chrome/locale/eu-ES/zotero/zotero.dtd
index 45152c056..076d915b5 100644
--- a/chrome/locale/eu-ES/zotero/zotero.dtd
+++ b/chrome/locale/eu-ES/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Jabetza">
 <!ENTITY zotero.items.dateAdded_column "Noiz gehitua">
 <!ENTITY zotero.items.dateModified_column "Noiz aldatua">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Bilatu liburutegian">
 <!ENTITY zotero.items.menu.attach.note "Oharra gehitu">
diff --git a/chrome/locale/fa/zotero/zotero.dtd b/chrome/locale/fa/zotero/zotero.dtd
index 895f1f39f..4d4eb5f79 100644
--- a/chrome/locale/fa/zotero/zotero.dtd
+++ b/chrome/locale/fa/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "حقوق">
 <!ENTITY zotero.items.dateAdded_column "تاریخ افزودن">
 <!ENTITY zotero.items.dateModified_column "تاریخ تغییر">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "نمایش در کتابخانه">
 <!ENTITY zotero.items.menu.attach.note "افزودن یادداشت">
diff --git a/chrome/locale/fi-FI/zotero/zotero.dtd b/chrome/locale/fi-FI/zotero/zotero.dtd
index 5a8ea6c2b..ec597e818 100644
--- a/chrome/locale/fi-FI/zotero/zotero.dtd
+++ b/chrome/locale/fi-FI/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "Date Added">
 <!ENTITY zotero.items.dateModified_column "Date Modified">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Show in Library">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/fr-FR/zotero/zotero.dtd b/chrome/locale/fr-FR/zotero/zotero.dtd
index 8d29aed49..9c36f7515 100644
--- a/chrome/locale/fr-FR/zotero/zotero.dtd
+++ b/chrome/locale/fr-FR/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Autorisations">
 <!ENTITY zotero.items.dateAdded_column "Date d'ajout">
 <!ENTITY zotero.items.dateModified_column "Date de modification">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Afficher dans la bibliothèque">
 <!ENTITY zotero.items.menu.attach.note "Ajouter une note">
diff --git a/chrome/locale/gl-ES/zotero/zotero.dtd b/chrome/locale/gl-ES/zotero/zotero.dtd
index 770384adf..742c46ae9 100644
--- a/chrome/locale/gl-ES/zotero/zotero.dtd
+++ b/chrome/locale/gl-ES/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Dereitos">
 <!ENTITY zotero.items.dateAdded_column "Data Alta">
 <!ENTITY zotero.items.dateModified_column "Data Modificación">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Amosar na Biblioteca">
 <!ENTITY zotero.items.menu.attach.note "Engadir Nota">
diff --git a/chrome/locale/he-IL/zotero/zotero.dtd b/chrome/locale/he-IL/zotero/zotero.dtd
index b85eedfb0..14461b418 100644
--- a/chrome/locale/he-IL/zotero/zotero.dtd
+++ b/chrome/locale/he-IL/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "זכויות">
 <!ENTITY zotero.items.dateAdded_column "תאריך הוספה">
 <!ENTITY zotero.items.dateModified_column "תאריך שינוי">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "הצג בספרייה">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/hr-HR/zotero/zotero.dtd b/chrome/locale/hr-HR/zotero/zotero.dtd
index 5a8ea6c2b..ec597e818 100644
--- a/chrome/locale/hr-HR/zotero/zotero.dtd
+++ b/chrome/locale/hr-HR/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "Date Added">
 <!ENTITY zotero.items.dateModified_column "Date Modified">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Show in Library">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/hu-HU/zotero/zotero.dtd b/chrome/locale/hu-HU/zotero/zotero.dtd
index 40b936cb7..15f3a9f63 100644
--- a/chrome/locale/hu-HU/zotero/zotero.dtd
+++ b/chrome/locale/hu-HU/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Jogok">
 <!ENTITY zotero.items.dateAdded_column "Hozzáadás dátuma">
 <!ENTITY zotero.items.dateModified_column "Módosítás dátuma">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Megjelenítés a könyvtárban">
 <!ENTITY zotero.items.menu.attach.note "Jegyzet hozzáadása">
diff --git a/chrome/locale/is-IS/zotero/zotero.dtd b/chrome/locale/is-IS/zotero/zotero.dtd
index d17af4db2..3f4f11e32 100644
--- a/chrome/locale/is-IS/zotero/zotero.dtd
+++ b/chrome/locale/is-IS/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "Date Added">
 <!ENTITY zotero.items.dateModified_column "Date Modified">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Show in Library">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/it-IT/zotero/zotero.dtd b/chrome/locale/it-IT/zotero/zotero.dtd
index b5d6603a8..aeaff4214 100644
--- a/chrome/locale/it-IT/zotero/zotero.dtd
+++ b/chrome/locale/it-IT/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Diritti">
 <!ENTITY zotero.items.dateAdded_column "Data di aggiunta">
 <!ENTITY zotero.items.dateModified_column "Data ultima modifica">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Visualizza nella libreria">
 <!ENTITY zotero.items.menu.attach.note "Aggiungi nota">
diff --git a/chrome/locale/ja-JP/zotero/zotero.dtd b/chrome/locale/ja-JP/zotero/zotero.dtd
index 6f6fe933e..d7915791b 100644
--- a/chrome/locale/ja-JP/zotero/zotero.dtd
+++ b/chrome/locale/ja-JP/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "権利">
 <!ENTITY zotero.items.dateAdded_column "作成日時">
 <!ENTITY zotero.items.dateModified_column "更新日時">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "ライブラリーで表示">
 <!ENTITY zotero.items.menu.attach.note "メモを追加">
diff --git a/chrome/locale/ko-KR/zotero/zotero.dtd b/chrome/locale/ko-KR/zotero/zotero.dtd
index 4e27ea0f9..7c4db8144 100644
--- a/chrome/locale/ko-KR/zotero/zotero.dtd
+++ b/chrome/locale/ko-KR/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "권리">
 <!ENTITY zotero.items.dateAdded_column "날짜 추가">
 <!ENTITY zotero.items.dateModified_column "날짜 변경">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "라이브러리로 표시">
 <!ENTITY zotero.items.menu.attach.note "노트 추가">
diff --git a/chrome/locale/mn-MN/zotero/zotero.dtd b/chrome/locale/mn-MN/zotero/zotero.dtd
index a9669d342..1928305bd 100644
--- a/chrome/locale/mn-MN/zotero/zotero.dtd
+++ b/chrome/locale/mn-MN/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "Date Added">
 <!ENTITY zotero.items.dateModified_column "Date Modified">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Show in Library">
 <!ENTITY zotero.items.menu.attach.note "Тэмдэглэл нэмэх">
diff --git a/chrome/locale/nb-NO/zotero/zotero.dtd b/chrome/locale/nb-NO/zotero/zotero.dtd
index 944ae0d1e..0961e45d0 100644
--- a/chrome/locale/nb-NO/zotero/zotero.dtd
+++ b/chrome/locale/nb-NO/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rettigheter">
 <!ENTITY zotero.items.dateAdded_column "Lagt til">
 <!ENTITY zotero.items.dateModified_column "Sist endret">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Vis i bibliotek">
 <!ENTITY zotero.items.menu.attach.note "Legg til notat">
diff --git a/chrome/locale/nl-NL/zotero/zotero.dtd b/chrome/locale/nl-NL/zotero/zotero.dtd
index cfbf7c5f9..56a3b6948 100644
--- a/chrome/locale/nl-NL/zotero/zotero.dtd
+++ b/chrome/locale/nl-NL/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rechten">
 <!ENTITY zotero.items.dateAdded_column "Datum toegevoegd">
 <!ENTITY zotero.items.dateModified_column "Datum bewerkt">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "In bibliotheek tonen">
 <!ENTITY zotero.items.menu.attach.note "Aantekening toevoegen">
diff --git a/chrome/locale/nn-NO/zotero/zotero.dtd b/chrome/locale/nn-NO/zotero/zotero.dtd
index b92c3f47d..1f549f26c 100644
--- a/chrome/locale/nn-NO/zotero/zotero.dtd
+++ b/chrome/locale/nn-NO/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rettar">
 <!ENTITY zotero.items.dateAdded_column "Lagt til">
 <!ENTITY zotero.items.dateModified_column "Sist endra">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Vis i bibliotek">
 <!ENTITY zotero.items.menu.attach.note "Legg til notat">
diff --git a/chrome/locale/pl-PL/zotero/zotero.dtd b/chrome/locale/pl-PL/zotero/zotero.dtd
index b980e225a..e07fbf408 100644
--- a/chrome/locale/pl-PL/zotero/zotero.dtd
+++ b/chrome/locale/pl-PL/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Prawa autorskie">
 <!ENTITY zotero.items.dateAdded_column "Data dodania">
 <!ENTITY zotero.items.dateModified_column "Data modyfikacji">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Wyświetl w bibliotece">
 <!ENTITY zotero.items.menu.attach.note "Dodaj notatkę">
diff --git a/chrome/locale/pt-BR/zotero/zotero.dtd b/chrome/locale/pt-BR/zotero/zotero.dtd
index 602f21731..c77a780f3 100644
--- a/chrome/locale/pt-BR/zotero/zotero.dtd
+++ b/chrome/locale/pt-BR/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Direitos">
 <!ENTITY zotero.items.dateAdded_column "Adição em">
 <!ENTITY zotero.items.dateModified_column "Modificação em">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Mostrar na biblioteca">
 <!ENTITY zotero.items.menu.attach.note "Adicionar nota">
diff --git a/chrome/locale/pt-PT/zotero/zotero.dtd b/chrome/locale/pt-PT/zotero/zotero.dtd
index 4e17fb872..cef8b2f95 100644
--- a/chrome/locale/pt-PT/zotero/zotero.dtd
+++ b/chrome/locale/pt-PT/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Direitos">
 <!ENTITY zotero.items.dateAdded_column "Data de Adição">
 <!ENTITY zotero.items.dateModified_column "Data de Modificação">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Mostrar na Biblioteca">
 <!ENTITY zotero.items.menu.attach.note "Adicionar Nota">
diff --git a/chrome/locale/ro-RO/zotero/zotero.dtd b/chrome/locale/ro-RO/zotero/zotero.dtd
index 8409560bc..e97b82fa8 100644
--- a/chrome/locale/ro-RO/zotero/zotero.dtd
+++ b/chrome/locale/ro-RO/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Drepturi">
 <!ENTITY zotero.items.dateAdded_column "Data adăugării">
 <!ENTITY zotero.items.dateModified_column "Data modificării">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Afișează în bibliotecă">
 <!ENTITY zotero.items.menu.attach.note "Adaugă notă">
diff --git a/chrome/locale/ru-RU/zotero/zotero.dtd b/chrome/locale/ru-RU/zotero/zotero.dtd
index 0e311feae..31673354b 100644
--- a/chrome/locale/ru-RU/zotero/zotero.dtd
+++ b/chrome/locale/ru-RU/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Права">
 <!ENTITY zotero.items.dateAdded_column "Добавлен">
 <!ENTITY zotero.items.dateModified_column "Изменён">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Показать в библиотеке">
 <!ENTITY zotero.items.menu.attach.note "Добавить заметку">
diff --git a/chrome/locale/sk-SK/zotero/zotero.dtd b/chrome/locale/sk-SK/zotero/zotero.dtd
index d0b299b61..60cb5cc1a 100644
--- a/chrome/locale/sk-SK/zotero/zotero.dtd
+++ b/chrome/locale/sk-SK/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Práva">
 <!ENTITY zotero.items.dateAdded_column "Pridané dňa">
 <!ENTITY zotero.items.dateModified_column "Upravené dňa">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Zobraziť v knižnici">
 <!ENTITY zotero.items.menu.attach.note "Pridať poznámku">
diff --git a/chrome/locale/sl-SI/zotero/zotero.dtd b/chrome/locale/sl-SI/zotero/zotero.dtd
index 4ce534d2e..8f8b6a14f 100644
--- a/chrome/locale/sl-SI/zotero/zotero.dtd
+++ b/chrome/locale/sl-SI/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Pravice">
 <!ENTITY zotero.items.dateAdded_column "Dodano dne">
 <!ENTITY zotero.items.dateModified_column "Datum spremembe">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Pokaži v knjižnici">
 <!ENTITY zotero.items.menu.attach.note "Dodaj opombo">
diff --git a/chrome/locale/sr-RS/zotero/zotero.dtd b/chrome/locale/sr-RS/zotero/zotero.dtd
index 5090597e0..ce345a59e 100644
--- a/chrome/locale/sr-RS/zotero/zotero.dtd
+++ b/chrome/locale/sr-RS/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Права">
 <!ENTITY zotero.items.dateAdded_column "Датум додавања">
 <!ENTITY zotero.items.dateModified_column "Датум промене">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Прикажи у библиотеци">
 <!ENTITY zotero.items.menu.attach.note "Додај белешку">
diff --git a/chrome/locale/sv-SE/zotero/zotero.dtd b/chrome/locale/sv-SE/zotero/zotero.dtd
index 7650b0ad4..1f5cf546d 100644
--- a/chrome/locale/sv-SE/zotero/zotero.dtd
+++ b/chrome/locale/sv-SE/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rättigheter">
 <!ENTITY zotero.items.dateAdded_column "Tillagt datum">
 <!ENTITY zotero.items.dateModified_column "Ändrat datum">
-<!ENTITY zotero.items.numChildren_column "Visa/dölj underordnade">
 
 <!ENTITY zotero.items.menu.showInLibrary "Visa i bibliotek">
 <!ENTITY zotero.items.menu.attach.note "Lägg till anteckning">
diff --git a/chrome/locale/th-TH/zotero/zotero.dtd b/chrome/locale/th-TH/zotero/zotero.dtd
index a5187b5ce..3e3f7e72c 100644
--- a/chrome/locale/th-TH/zotero/zotero.dtd
+++ b/chrome/locale/th-TH/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Rights">
 <!ENTITY zotero.items.dateAdded_column "วันที่เพิ่ม">
 <!ENTITY zotero.items.dateModified_column "วันที่แก้ไข">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "แสดงในไลบรารี่">
 <!ENTITY zotero.items.menu.attach.note "Add Note">
diff --git a/chrome/locale/tr-TR/zotero/zotero.dtd b/chrome/locale/tr-TR/zotero/zotero.dtd
index 9c89c15b8..de21c3a15 100644
--- a/chrome/locale/tr-TR/zotero/zotero.dtd
+++ b/chrome/locale/tr-TR/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Telif">
 <!ENTITY zotero.items.dateAdded_column "Eklendiği Tarih">
 <!ENTITY zotero.items.dateModified_column "Değiştirildiği Tarih">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Kitaplıkta Göster">
 <!ENTITY zotero.items.menu.attach.note "Not Ekle">
diff --git a/chrome/locale/vi-VN/zotero/zotero.dtd b/chrome/locale/vi-VN/zotero/zotero.dtd
index 2c70f27b9..bcb2b0367 100644
--- a/chrome/locale/vi-VN/zotero/zotero.dtd
+++ b/chrome/locale/vi-VN/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "Quyền hạn">
 <!ENTITY zotero.items.dateAdded_column "Ngày tạo lập">
 <!ENTITY zotero.items.dateModified_column "Ngày thay đổi">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "Hiển thị trong Thư viện">
 <!ENTITY zotero.items.menu.attach.note "Tạo một Ghi chép">
diff --git a/chrome/locale/zh-CN/zotero/zotero.dtd b/chrome/locale/zh-CN/zotero/zotero.dtd
index 83e0d4797..17a328ca6 100644
--- a/chrome/locale/zh-CN/zotero/zotero.dtd
+++ b/chrome/locale/zh-CN/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "权限">
 <!ENTITY zotero.items.dateAdded_column "添加时间">
 <!ENTITY zotero.items.dateModified_column "修改时间">
-<!ENTITY zotero.items.numChildren_column "+">
 
 <!ENTITY zotero.items.menu.showInLibrary "在书库中显示">
 <!ENTITY zotero.items.menu.attach.note "添加便笺">
diff --git a/chrome/locale/zh-TW/zotero/zotero.dtd b/chrome/locale/zh-TW/zotero/zotero.dtd
index 93c88519a..c443208b4 100644
--- a/chrome/locale/zh-TW/zotero/zotero.dtd
+++ b/chrome/locale/zh-TW/zotero/zotero.dtd
@@ -56,7 +56,6 @@
 <!ENTITY zotero.items.rights_column "權利">
 <!ENTITY zotero.items.dateAdded_column "加入日期">
 <!ENTITY zotero.items.dateModified_column "修改日期">
-<!ENTITY zotero.items.numChildren_column "＋">
 
 <!ENTITY zotero.items.menu.showInLibrary "在圖書館中顯示">
 <!ENTITY zotero.items.menu.attach.note "加入筆記">