This ensures the schema is always valid. Otherwise, it could end with a
comma which is seen as invalid schema.

This commit adds a new field and a new record type, the department.
It comes as a replacement for the area text field and allows for
department records to be created. This also introduces a migration
wizard, that can create new departments out of the old area entries.

[TASK] Using contact for email addreess, ts setting for default contact. General issues with the models