This is the equivalent control to Qt Quick Controls’ own DayOfWeekRow,
but for the number of each day in the visible range, instead of day of
the week.
Qt Quick Controls has this component written in C++, and also has a
separate, internal, model for the days in different formats, but i had
to implement the control in QML, because QtQuickControl is private.
However, as far as i understand, it is not much more than a container
for the delegate and the model that is used as a template.
