Citizen mesh updates
- Significantly improved upper arm twist, armpit, and shoulder-neck deformations. Preview: https://files.facepunch.com/maxlebled/1b0811b1/citizen_v2_june22update_2.gif
- Reflected recent changes on LOD3; fixed symmetrical inconsistencies (tris count dropped a bit more as a result!)
- LOD2/3 culling prefabs don't cull the upper arm twist bones anymore, because the effect on deformation is too important
- Upper arm twist constraint weight lowered to 0.6