Partially finish the bug after window close and reshow

Sine Striker

2024-02-20 2d2fc799bc698ebf7e7c8bcc394366d0d7bf071b

 examples/mainwindow/main.cpp

@@ -32,5 +32,8 @@

    MainWindow w;
    w.show();

    QMainWindow w2;
    w2.show();
    return a.exec();
}