Ticket #17058: #17058.patch

wp-admin/js/common.dev.js

@@ -48 +48 @@
         toggle : function(el) {
                 el.slideToggle(150, function() {
                         var id = el.parent().toggleClass( 'wp-menu-open' ).attr('id');
+                        el.removeAttr('style');
                         if ( id ) {
                                 $('li.wp-has-submenu', '#adminmenu').each(function(i, e) {
                                         if ( id == e.id ) {