Fix typo when fetching groups

src/views/appstore.js

@@ -422,7 +422,7 @@ angular.module('Application').controller('AppStoreController', ['$scope', '$loca
         Client.getGroups(function (error, groups) {
             if (error) {
                 console.error(error);
-                return $timeout(fetchUsers, 5000);
+                return $timeout(fetchGroups, 5000);
             }
 
             $scope.groups = groups;