Added the condition to removeItems, that the to be removedItem be direct child of the menus HTML element.

Change-Id: Ife934e340ab30ed5d497a40659e6a48f8d3922ff
diff --git a/dev/js/src/menu.js b/dev/js/src/menu.js
index 6aff7fa..4e93390 100644
--- a/dev/js/src/menu.js
+++ b/dev/js/src/menu.js
@@ -637,10 +637,12 @@
      * Delete all visible items from the menu element
      */
     
-     removeItems : function () {
+    removeItems : function () {
       const liElements=this._el.getElementsByTagName("LI");
-      while (liElements.length>0){
-        this._el.removeChild(liElements[0]);
+      for (let ii = liElements.length-1; ii >= 0; ii-- ) {
+        if (liElements[ii].parentNode === this._el){
+          this._el.removeChild(liElements[ii]);
+        };
       };
      },