Snap Mouse pointer to default button broken on Windows in Qt 5

On Windows 7, in the mouse properties dialog, you can tick a checkbox to automatically move the mouse pointer to the default button in a dialog box (cf pic).

The attached project is the MainWindow default project with a simple close event function :

 
void MainWindow::closeEvent(QCloseEvent* event)
{
    QMessageBox::StandardButton button = QMessageBox::question(this, "Quittez ?", "Voulez vous ?", QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);
    if(button == QMessageBox::No) {
        event->ignore();
    }
}

This feature was working great on Qt 4.8 (tested with example attached) but is broken in Qt 5.1 at least (didn't check on Qt 5.0).