QOL improve room ownership management

Allow rooms with owned items to form in an "it's complicated" state.

Assigning the room to someone takes all own-able furniture for the kingdom, the recipient merges the furniture's morale bonus in to the rooms, anyone else with furniture in the room gets the x took y from me penalties.

When assigning the room via belongings append an asterisk and a list of items owners to its name.

When assigning via the room's drop-down append an asterisk to the owners names.