Three levels of room AI

Since the beginning of DA, when creating a new room and whether AI is or off, the new room is able to delete objects in rooms with which it shares wall(s). The two images provided should demonstrate this: Notice how one of the hallway candles has disappeared after the new room has finished generating. I would suggest two things:

1. It should by default not be possible for a new room to delete features in neighbouring rooms; the user might be given the option to switch this off.
2. It should be possible to have three selections for the AI feature:
   a) Off: no features are added at all.
   b) Partially on: windows and doors are added (i.e. through-wall features).
   c) On: All room features may be added (i.e. as per now).