Reset LED on exit

flipper_pong.c

@@ -279,6 +279,7 @@ int32_t flipper_pong_app() {
         view_port_update(view_port);
     }
 
+    notification_message(notification, &sequence_reset_rgb);
     furi_message_queue_free(event_queue);
     delete_mutex(&state_mutex);
     gui_remove_view_port(gui, view_port);