Merge forwardport of #13341 to 2.3-develop branch

Applied pull request patch https://github.com/magento/magento2/pull/13341.patch (created by @arnoudhgz) based on commit(s):
  1. 5714ffd
  2. 5773225

Fixed GitHub Issues in 2.3-develop branch:
  - #13327: Menu ui-state-active not removed from previous opened menu item (reported by @arnoudhgz)

lib/web/mage/menu.js

@@ -629,6 +629,9 @@ define([
                     return;
                 }
 
+                // remove the active state class from the siblings
+                this.active.siblings().children('.ui-state-active').removeClass('ui-state-active');
+
                 this._open(newItem.parent());
 
                 // Delay so Firefox will not hide activedescendant change in expanding submenu from AT