QML Windows accept drag events when blocked by modal windows

...

    case QEvent::DragEnter:
    case QEvent::DragLeave:
    case QEvent::DragMove:
    case QEvent::Drop:
        if (!d->blockedByModalWindow) {
            d->deliverDragEvent(d->dragGrabber, e);
        }
        else {
            e->ignore();
        }
        break;