Bug #1200 - partial fix, idling actors near closed interior doors are moved on.

Also resolved the cases where some actors walk towards a closed door forever which also stops the actor from opening the door.  AiCombat scenarios are not yet implemented.  The actor's behaviour after this change can be observed by hovering over the rat near the lower jail cell "Gnisis, Arvs-Drelen" (use tcl to hover/observe).  Also took this opportunities to revert some styling or preference changes made.