Fixes #326, Icons are stretched (wider) on Linux

Also fixes some issues with the search textboxes on the toolbar and in the tag selector, including compression of the search cancel button

chrome/skin/default/zotero/bindings/tagselector.css

@@ -2,6 +2,7 @@ groupbox
 {
 	overflow: auto;
 	min-height: 130px;
+	padding-bottom: 2px;
 }
 
 #tags-toggle
@@ -52,12 +53,21 @@ groupbox > hbox
 	-moz-box-pack: center;
 }
 
+textbox
+{
+	margin: 3px 0 2px;
+	font-size: 11px !important; /* Keep font size in Linux within reason */
+}
+
 #search-cancel
 {
-	margin: 0px;
-	padding: 0px;
+	width: 0;
+	height: 0;
+	margin: 0;
+	padding: 0;
 	cursor: default;
 	list-style-image: url('chrome://zotero/skin/search-cancel.png');
+	-moz-appearance: none !important; /* Fix rendering problems on Linux */
 }
 
 groupbox > hbox > hbox
@@ -73,8 +83,3 @@ toolbarbutton.zotero-clicky
 	padding:1px;
 	height:1em;
 }
-
-textbox
-{
-	margin: 3px 0 1px;
-}

chrome/skin/default/zotero/overlay.css

@@ -95,7 +95,17 @@
 	list-style-image: url(chrome://zotero/skin/tag-selector.png);
 }
 
+/* Hard-code this to fix toolbar icon compression on Linux */
+#zotero-pane toolbar
+{
+	height: 32px !important;
+}
 
+/* Remove extra padding on Linux */
+#zotero-pane {
+	padding-top: 0;
+	padding-bottom: 0;
+}
 
 /* These fix a rendering bug in Fx2.0b2 */
 #zotero-pane toolbarbutton .toolbarbutton-text
@@ -180,6 +190,7 @@
 
 #zotero-tb-search
 {
+	font-size: 11px !important; /* Keep font size in Linux within reason */
 	width: 150px;
 }
 
@@ -190,10 +201,13 @@
 
 #zotero-tb-search-cancel
 {
-	margin: 0px;
-	padding: 0px;
+	width: 10px;
+	height: 10px;
+	margin: 0;
+	padding: 0;
 	cursor: default;
 	list-style-image: url('chrome://zotero/skin/search-cancel.png');
+	-moz-appearance: none !important; /* Fix rendering problems on Linux */
 }
 
 #zotero-tb-search-cancel:hover:active