add none folder from service layer

src/popup/app/vault/vaultAddSiteController.js

@@ -25,10 +25,7 @@
         popupUtils.initListSectionItemListeners();
 
         $q.when(folderService.getAllDecrypted()).then(function (folders) {
-            $scope.folders = folders.concat([{
-                id: null,
-                name: '(none)'
-            }]);
+            $scope.folders = folders;
         });
 
         $scope.savePromise = null;