Ticket #4567: 4567_2.patch

_source/plugins/wysiwygarea/plugin.js

@@ -459 +459 @@
                                                 {
                                                         editor.on( 'key', function( event )
                                                         {
+                                                                if( editor.mode != 'wysiwyg' )
+                                                                        return;
+
                                                                 // Backspace.
                                                                 var control = event.data.keyCode == 8
                                                                                           && editor.getSelection().getSelectedElement();