+ make 'Merge project' undo/redoable

CMakeLists.txt

@@ -4,7 +4,7 @@ set(FREECAD_VERSION "0.16")
 set(PACKAGE_NAME "FreeCAD")
 set(PACKAGE_VERSION_MAJOR "0")
 set(PACKAGE_VERSION_MINOR "16")
-set(PACKAGE_VERSION_PATCH "6699")
+set(PACKAGE_VERSION_PATCH "6700")
 set(PACKAGE_VERSION "${PACKAGE_VERSION_MAJOR}.${PACKAGE_VERSION_MINOR}.${PACKAGE_VERSION_PATCH}")
 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
 

src/Gui/CommandDoc.cpp

@@ -333,10 +333,13 @@ void StdCmdMergeProjects::activated(int iMsg)
             return;
         }
 
+        doc->openTransaction("Merge project");
         Base::FileInfo fi((const char*)project.toUtf8());
         Base::ifstream str(fi, std::ios::in | std::ios::binary);
         MergeDocuments md(doc);
         md.importObjects(str);
+        str.close();
+        doc->commitTransaction();
     }
 }