Disable GL SetAttributes for Windows due to many testers with problems. This restores .15 behaviour. If we can find willing testers, perhaps we can narrow down which attribute was the problem. Also reenable F12 bind for Windows.

#include <QApplication>

#include "mainform.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MyWindow *mainWin = new MyWindow;
    mainWin->show();
    return app.exec();
}