Refactor|ResourceSystem: Moved mobj visualization resource selection out of ResourceSystem
Sprite and model selection logic is now handled by Mobj_Sprite() and Mobj_ModelDef() respectively. Sprite radius calculation was moved to Sprite::visualRadius().
Refactor|ResourceSystem: Moved mobj visualization resource selection out of ResourceSystem
Sprite and model selection logic is now handled by Mobj_Sprite() and
Mobj_ModelDef() respectively. Sprite radius calculation was moved to
Sprite::visualRadius().
Plus some general resource system cleanup.