Use of KeyNavigation does not have visual change of focus

If I have set of buttons with KeyNavigation.<direction> between them, I can move focus, but I don't see that.

The reason is that KeyNavigation.<direction> uses Qt.OtherFocusReason. And QQuickStyleItem sets its hasFocus property only in case of Qt.TabFocusReason or Qt.BacktabFocusReason (See here).

    // some styles don't draw a focus rectangle if
    // QStyle::State_KeyboardFocusChange is not set
    if (window()) {
         Qt::FocusReason lastFocusReason = QQuickWindowPrivate::get(window())->lastFocusReason;
         if (lastFocusReason == Qt::TabFocusReason || lastFocusReason == Qt::BacktabFocusReason) {
             m_styleoption->state |= QStyle::State_KeyboardFocusChange;
         }
    }

Possible solutions would be to respect Qt.OtherFocusReason in QQuickStyleItem or make KeyNavigation use Qt.TabFocusReason instead of its current behaviour.

Personally, I don't like both ways. I would prefer to add a new focus reason (e.g. Qt.KeyNavigationFocusReason) to specify this particular case.