Help the hair salon to hanlde cases where a task can be break down in 2
parts. The initial appointment is break down in 2 new appointment
separeted by a break.

task-4100134

The working hours related to the contracts of the employe must be in the
same time zone as the appointment. Otherwise this leads to conflict in
the timeshifts availible. So now both are on Brussel timezone.

task-4100134

In the hair salon the reminder were applied to the child also however we
don't want to have reminder on the parent and on the child so the worker
does not have too much notifications. Reminder are kept in the parent
calendar.event.

task-4100134