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

@@ -349,8 +349,13 @@ define([
                 }, 300);
             }
         },
-        _delay: function(handler, delay) {
-            this._super(handler, delay);
+        _delay: function( handler, delay ) {
+            var instance = this,
+                handlerProxy = function () {
+                return ( typeof handler === "string" ? instance[ handler ] : handler )
+                    .apply( instance, arguments );
+            };
+            return setTimeout( handlerProxy, delay || 0 );
         }
     });