Qt/NetPlayDialog: Stop games properly

Source/Core/DolphinQt2/NetPlay/NetPlayDialog.h

@@ -109,5 +109,6 @@ private:
   GameListModel* m_game_list_model = nullptr;
   bool m_use_traversal = false;
   bool m_is_copy_button_retry = false;
+  bool m_got_stop_request = true;
   int m_buffer_size = 0;
 };