[REG: 6.6->6.7] QComboBox custom view is destroyed if style changes

void QComboBox::changeEvent(QEvent *e)
{
    Q_D(QComboBox);
    switch (e->type()) {
    case QEvent::StyleChange:
        if (d->container) {
// If on Windows, force recreation of ComboBox container, since
// windows11 style depends on WA_TranslucentBackground
#ifdef Q_OS_WIN
            auto delegate = itemDelegate();
            d->container->deleteLater();