Qt: Don't show main window when changing setup wizard options

src/duckstation-qt/mainwindow.cpp

@@ -3047,6 +3047,9 @@ void MainWindow::checkForSettingChanges()
   }
 
   LogWindow::updateSettings();
+
+  // don't refresh window state while setup wizard is running, i.e. no game and hidden
+  if (isVisible() || s_system_valid || s_system_starting)
     updateWindowState();
 }