fix event handlers and split panel resize event

source/Ox.UI/js/Core/Ox.Element.js

@@ -101,11 +101,10 @@ Ox.Element = function(options, self) {
 
         function bind(action, event, fn) {
             self.$eventHandler[action]('ox_' + event, function(event, data) {
-                // fixme: remove second parameter (legacy)
                 fn(Ox.extend({
                     _element: that.$element,
                     _event: event
-                }, data), data);
+                }, data));
             });
         }