QCalendarWidget doesn't show localized year properly

1. run calendarwidget example
2. set locale to Arabic/Egypt
3. press year button and set it to another year

Expected behavior: calendarwidget shows localized year at the beginning and change the month doesn't change the localized year back to numbers.

Current behavior: calendarwidgets year is changing from localized to non localized and back, should be consistent.

The problem comes from, that void QCalendarWidgetPrivate::updateNavigationBar() is setting number instead of localized string with yearButton->setText.
yearButton->setText(q->locale().toString(m_model->m_shownYear)); may be a fix.