Merge pull request #7179 from lukasolson/expose-notifier-add

[notifier] Expose add() method to allow more customizable pop-ups

src/ui/public/notify/notifier.js

@@ -119,6 +119,8 @@ function add(notif, cb) {
   return notif;
 }
 
+Notifier.prototype.add = add;
+
 function formatInfo() {
   let info = [];