Fix issue

lib/ui/routes/push_notifications_route.dart

@@ -78,7 +78,7 @@ class PushNotificationsConfigurationWidget extends StatefulWidget {
   const PushNotificationsConfigurationWidget({
     Key key,
     @required this.onConfigured,
-    this.onChanged,
+    @required this.onChanged,
   }) : super(key: key);
 
   @override
@@ -101,6 +101,8 @@ class PushNotificationsConfigurationWidgetState
     if (currStatus == PushNotificationsStatus.UNDEFINED &&
         srvConfig.notificationsPolicy.hasFirebase)
       currStatus = PushNotificationsStatus.FIREBASE;
+
+    widget.onChanged();
   }
 
   @override