* Implement disabled state for wheelmenu buttons
* Simplify wheelmenu definitions
* Fix bogus warning for doll elements during stale displayable evaluation (cache)
* Added IfExpr Action.
* Added string evals for If func.
* Added reset_action method for RoomObject class.
* Added new actions appropriate for room relevant objects.
* Fixed a potential issue with reset_variables method within Events class.
* Fixed single button radius calculation in wheel menu
* Fixed crash if a null list of actions was supplied to create_wheelmenu method.
* Converted intro to use wheel menu actions.
* Split existing room object labels where it made sense.
* Added new head icons for characters
* Fixed initial genie head position for the wheel menu
* Added new interface sounds
* Converted door interface to the new wheel menu (partial)
* Fixed wheel menu condition bug
