void MainWindow::on_actionKeyboardShortcuts_triggered()
{
    QDesktopServices::openUrl(QUrl("https://www.shotcut.org/howtos/keyboard-shortcuts/"));
}
void MainWindow::on_actionKeyboardShortcuts_triggered()
{
    QDesktopServices::openUrl(QUrl("https://www.shotcut.org/howtos/keyboard-shortcuts/"));
}