MAGETWO-91651: Navigation Menu problem on Mobile theme

- Added scroll to top menu items

Author: Nikita Chubukov

lib/web/mage/menu.js

@@ -439,6 +439,7 @@ define([
 
                     event.preventDefault();
                     target = $(event.target).closest('.ui-menu-item');
+                    target.get(0).scrollIntoView();
 
                     if (!target.hasClass('level-top') || !target.has('.ui-menu').length) {
                         window.location.href = target.find('> a').attr('href');