WindowsVistaStyle: Artifact in QPushButton with menu in highDpi mode

The size of the arrow of QPushButton with menu is anti proportional to the scaling factor. Either the triangle could be bigger, or it could have the same nice marker as the comboboxes have (after the recent HighDpi fixes in windows style)

This is how the menu gets added to a QPushButton:

    auto menu = new QMenu;
    menu->addAction("A");
    menu->addAction("B");
    menu->addAction("C");
    ui->pushButtonWithMenu->setMenu(menu);