Add 'set bounding box scale' ACE and script function

Add 'set bounding box scale' ACE and script function. This can help keep the bounding box visible as the orientation and location of a 3DObject moves within the viewport. I have found scales of 1.5-2 work well.

If using this function, I recommend using another sprite pinned to the 3DObject as a bounding box used for collision, behaviors, etc. (in general I think this is the better way, treat 3DObject like an animation, but another sprite used for game logic, behaviors and collisions.