Features in KDE Base
Make the calendar applet follow current locale with first day in week
Also rename startDay property to firstDayOfWeek property so it's more
clear what it does. Handling the first day of week is changed a bit too
as QML uses 0 for Sunday while QDate uses 7 for Sunday, so the
getter/setter is accomodated to that fact and converts from 0 to 7 on
setting and vice-versa in the getter.