As an admin, can I edit the band members' absences?

The absences of band members are one of the few things that admins cannot edit for other band members because they are cross-band members.

As a result, band members who are part of several bands on the platform do not have to add absences multiple times.

For this use case where someone is active in several bands, an absence in all other bands is automatically displayed when an appointment is confirmed in one band.