[DE] List content controls: show empty element

apps/documenteditor/main/app/view/DocumentHolder.js

@@ -4061,7 +4061,7 @@ define([
                 });
                 menu.on('item:click', function(menu, item) {
                     setTimeout(function(){
-                        me.api.asc_SelectContentControlListItem(item.value, me._listObj.get_InternalId());
+                        (item.value!==-1) && me.api.asc_SelectContentControlListItem(item.value, me._listObj.get_InternalId());
                     }, 1);
                 });
 
@@ -4087,6 +4087,12 @@ define([
                         value       : specProps.get_ItemValue(i)
                     }));
                 }
+                if (count<1) {
+                    menu.addItem(new Common.UI.MenuItem({
+                        caption     : this.txtEmpty,
+                        value       : -1
+                    }));
+                }
             }
 
             menuContainer.css({left: x, top : y});
@@ -4339,7 +4345,8 @@ define([
         txtPrintSelection: 'Print Selection',
         textCells: 'Cells',
         textSeveral: 'Several Rows/Columns',
-        txtInsertCaption: 'Insert Caption'
+        txtInsertCaption: 'Insert Caption',
+        txtEmpty: '(Empty)'
 
     }, DE.Views.DocumentHolder || {}));
 });

apps/documenteditor/main/locale/en.json

@@ -1377,6 +1377,7 @@
   "DE.Views.DocumentHolder.txtUngroup": "Ungroup",
   "DE.Views.DocumentHolder.updateStyleText": "Update %1 style",
   "DE.Views.DocumentHolder.vertAlignText": "Vertical Alignment",
+  "DE.Views.DocumentHolder.txtEmpty": "(Empty)",
   "DE.Views.DropcapSettingsAdvanced.strBorders": "Borders & Fill",
   "DE.Views.DropcapSettingsAdvanced.strDropcap": "Drop Cap",
   "DE.Views.DropcapSettingsAdvanced.strMargins": "Margins",