Feature settings. i18n of notification bar.

src/services/constantsService.js

@@ -1,6 +1,7 @@
 function ConstantsService() {
     return {
         disableGaKey: 'disableGa',
+        disableAddSiteNotificationKey: 'disableAddSiteNotification',
         lockOptionKey: 'lockOption',
         lastActiveKey: 'lastActive'
     };