Allow deleting planes
Use updateRoom
Rework corner and clear keybindings
Implement corner suggestion clicking
Add clearSelections
Also print room name when clicking a room
suggestPoints can now auto-assign the corners if there are only 8 good candidates
Make selected room an ID.

Makes sure we can't refer to old room data using that.
Add autoAlignAndRotate
Extract roomAutoAlignAxis from autoAlignFloor
Improve autoAlignAndRotate to fully snap to the axes
Add TODO
Allow moving rooms around with the keyboard
Catch matrix being singular in room translation optimisation
Make safecopy data structure for what we save, but maintain legacy room loading
Allow exporting transformation matrixes in .xf format to xf/ folder.

Allows using these matrices on .ply files with the `plyxform` tool.