TF-1829 Fix app crash upon 401

(cherry picked from commit 8906322f932c4e1edadaf3f1831fc533fddd9a8b)

lib/main/localizations/app_localizations.dart

@@ -3007,4 +3007,8 @@ class AppLocalizations {
       'Messages have been resent',
       name: 'messagesHaveBeenResent');
   }
+
+  String get connectionError {
+    return Intl.message('Connection error');
+  }
 }