Merge pull request #15861 from JMAConsulting/core-1398

#1398: Option to open navigation item in new window (if present)

js/crm.menubar.js

@@ -471,7 +471,7 @@
   }
 
   function attr(el, item) {
-    var ret = [], attr = _.cloneDeep(item.attr || {}), a = ['rel', 'accesskey'];
+    var ret = [], attr = _.cloneDeep(item.attr || {}), a = ['rel', 'accesskey', 'target'];
     if (el === 'a') {
       attr = _.pick(attr, a);
       attr.href = item.url || "#";