Moving doors from room to room in Django admin should move the doors in Gather too

[dylanm312]

Is your feature request related to a problem? Please describe.
At the moment, if you edit a door in Django admin and move it to another room, that change isn't reflected in Gather.

Describe the solution you'd like
Moving a door between rooms in Django admin should also move the door in Gather

Describe alternatives you've considered
Room foreign key on door objects could be made read-only, so that doors cannot be moved between rooms and must instead be deleted and re-added