MAGETWO-32234: Subcategories in menu are shown instantly when user moves mouse quickly

- Added delay config and fix

Author: Ihor Melnychenko

lib/web/mage/menu.js

@@ -349,11 +349,8 @@ define([
                 }, 300);
             }
         },
-
         _delay: function(handler, delay) {
-            handler.apply(this, arguments);
-
-            return setTimeout(function() {}, delay || 0);
+            this._super(handler, delay);
         }
     });