-Adds neutral height/width changing body shape traits available for all, based on the polaris modifier traits. (tall/taller/short/shorter and fat/obese/thin/thinner) The height traits are mutually exclusive only with other height traits, same with width traits so you can be extra tall and extra wide at the same time.
-Makes our mob size_multiplier stuff compatible with icon_scale_x/y stuff.
-Brings back proper tile alignment and adequate space for character previews, which now also scale correctly, and properly preview sharp/fuzzy scaling effects and the body shape traits.
Turns out fixing the busted update_transform proc revealed it lacked the thing that the previous scaling offset fix gave to the other size procs that did function back then.
-Fixes update_transform proc for mobs. Meaning that the proc now actually does something and that mobs with pre-set size multipliers now spawn in the correct size.
-Removes some textbook spaghetti code that was making mice spawn in double (triple?) feigned size multipliers in order to be scoopable. Instead makes miniscule (mob_size var) mobs (such as mice) scoopable by default.
-This also fixes morphs in mouse form becoming tiny.
-Taller icons no longer sink into the tile below on the resize mechanics.
-Living mobs now have a var (vis_height) for their icon height, and humanmob species have a new var (icon_height) that overrides the vis_height for the resize proc.
-Also earlyports some tweaks to ambient occlusion. The new filter system took the old filter's settings as "make the shadows megathick and dummy intense" and that was ugly.
* handle_micro_bump_helping was unconditionally returning TRUE, overriding normal bump behavior. Fixed to only return TRUE when its size conditions are met.
* As a side effect of that bug, now_pushing was not being set back to zero. Fixing the prior bug solved that, but as an extra precaution, moved now_pushing = 0 out of the proc so it will get set back no matter what.
Defines this proc so that it will work on every mob, then overrides it on living to work like normal. I'd use INFINITE but I have no idea what would happen if it tried to do math on it.
