Locale dependent bindings not reevaluated after locale change

QML has https://doc.qt.io/qt-6/qml-qtqml-locale.html to expose locale related functionality. It can be used in bindings, e.g.

Text {
    text: Qt.locale().decimalPoint
}

However, that binding is not updated when the locale changes – nothing reacts to Qt's QEvent::LocaleChange. We should consider handling it in a similar way to translations.