Ensure notifications are only fetched and shown for at least admins

src/js/main.js

@@ -64,6 +64,8 @@ angular.module('Application').controller('MainController', ['$scope', '$route',
     };
 
     function refreshNotifications() {
+        if (!Client.getUserInfo().isAtLeastAdmin) return;
+
         Client.getNotifications({ acknowledged: false }, 1, 100, function (error, results) { // counter maxes out at 100
             if (error) console.error(error);
             else $scope.notificationCount = results.length;