Convert admin section controllers to ES6 modules

app/assets/javascripts/admin/controllers/admin-groups.js.es6

@@ -0,0 +1,26 @@
+export default Ember.ArrayController.extend({
+  sortProperties: ['name'],
+
+  refreshingAutoGroups: false,
+
+  actions: {
+    refreshAutoGroups: function(){
+      var self = this,
+          groups = this.get('model');
+
+      self.set('refreshingAutoGroups', true);
+      this.transitionToRoute('adminGroups.index').then(function() {
+        Discourse.ajax('/admin/groups/refresh_automatic_groups', {type: 'POST'}).then(function() {
+          return Discourse.Group.findAll().then(function(newGroups) {
+            groups.clear();
+            groups.addObjects(newGroups);
+          }).finally(function() {
+            self.set('refreshingAutoGroups', false);
+          });
+        });
+      });
+    }
+  }
+
+});
+