Ticket #5100: 5100_2.patch

_source/core/dom/element.js

@@ -1162 +1162 @@
                                 function()
                                 {
                                         this.$.style.MozUserSelect = 'none';
+                                        this.on( 'dragstart', function (evt) { evt.data.preventDefault(); } );
                                 }
                         : CKEDITOR.env.webkit ?
                                 function()
                                 {
                                         this.$.style.KhtmlUserSelect = 'none';
+                                        this.on( 'dragstart', function (evt) { evt.data.preventDefault(); } );
                                 }
                         :
                                 function()

_source/plugins/panel/plugin.js

@@ -192 +192 @@
                                         this );
 
                                 holder = doc.getBody();
+                                holder.unselectable();
                         }
                         else
                                 holder = this.document.getById( 'cke_' + this.id );