Merge pull request #2326 from Cacodemon345/patch-79

qt: Force the renderer to exit at close time

src/qt/qt_mainwindow.cpp

@@ -524,6 +524,7 @@ void MainWindow::closeEvent(QCloseEvent *event) {
         ui->stackedWidget->mouse_exit_func();
 
     ui->stackedWidget->switchRenderer(RendererStack::Renderer::Software);
+    QApplication::processEvents();
     event->accept();
 }