Polishing pack #2 [0.8.86]

This is the last update before starting work on the new story level.

• The Static Shield skill has been replaced by Power Transfusion
  
• New crafting stations for healing and charging are now displayed on the mini-map.
  
• A sort button was added to the inventory.
  
• Fixed a significant sound problem in co-op mode. Previously, the “virtual listener” was located in the middle between 2 players, which caused incorrect sound if the players were far from each other. Now the system works differently, providing 90% correct sound at any distance.
  
• You can now replace equipment in the inventory without having to remove the previous equipment.
  
• The Olympic rifle now has a visual indication of charging.
  
• Small fixes for the co-op.