Update 1.50c: Improvements and Hotfix

- Improvement: Overall posture of the crouching operator when not aiming
- Improvement: Camera position in third-person view when the player is moving in a crouched position
- Improvement: Reduction in the size of very large textures
- Improvement: Optimization of corpse physics
- Improvement: Enemy spawn logic in "WAR" and "SIEGE" modes
- Fix: Dead or unsconcious bodies kept twitching indefinitely
- Fix: "Demolition" objective did not appear correctly on the "Brattvog Village" map
- Fix: The canted weapon position remained active when the operator was leaning
- Fix: A staircase was impassable for the AI on the "Secret Bunker" map
- Fix: A stock for the V4 weapon was not correctly positioned