Update v0.9.8f12 - Added new mortars, new Kos mission and more

Hi everyone.

Many changes has been done during last 7 days.
Here's the changelogs:

New Features: (2 October 2021)
• Shooting range has been fully reworked.
  (8 October 2021)
• Added 3rd Kos mission.
  (9 October 2021)
• Added Granatwerfer 36 mortar and reworked M1 mortar.
  
• Added reverb effect inside buildings.
  

Fixes: (2 October 2021)
• Fixes in weapons and vehicles.
  
• Fixes in Mission Objectives.
  
• Reworked US helmets.
  
• Various other fixes.
  (4 October 2021)
• Improvements in animations.
  
• Various other small fixes and improvements.
  (8 October 2021)
• Improvements in animations.
  
• Fixes in throw grenades in TPS.
  
• Improved leaning.
  
• Various other small fixes and improvements.
  (9 October 2021)
• Improved AI.
  

Join Discord server to get in touch for feedbacks and suggestions.

Thank you all,
Marco