void MainWindow::writeSettings()
{
    QSettings sett("blackplastic-theme/config");
    sett.setValue("color", ui->Color->currentText());
    sett.setValue("transitions", ui->Transition->currentText());
}

void MainWindow::readSettings()
{
    QSettings sett("blackplastic-theme/config");
//    bool OK;
    QString color = sett.value("color", QVariant("")).toString();
    QString transitions = sett.value("transitions", QVariant("")).toString();
    ui->Color->setCurrentText(color);
    ui->Transition->setCurrentText(transitions);
}