-Adds a new var to specify nonstandard borg sprite sizes. No longer dogborg exclusive.
-Makes the dogborg var usable for standard sizes as well (for the special features like rest poses and gun/gut overlays)
-Makes the borg reset module reset the forementioned vars.
-Excludes wideborg from the standard size polaris/vore vr_sprite_check to avoid unintended default file reverts.
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