TF-1812 Implement interactor store sending email

(cherry picked from commit d1a064ec87c9f0ebdb373c893d891db9a93a9d37)

lib/main/localizations/app_localizations.dart

@@ -2869,4 +2869,11 @@ class AppLocalizations {
       'Cannot select this image.',
       name: 'cannotSelectThisImage');
   }
+
+  String get messageHasBeenSavedToTheSendingQueue {
+    return Intl.message(
+      'Message has been saved to the sending queue.',
+      name: 'messageHasBeenSavedToTheSendingQueue',
+    );
+  }
 }