Campaign First Chapter Balancing

• Limited interior objective count to 1
• Reduced the amount of open doors
• Disabled the 5x15 rooms

Improvements

• Added 1 more grenade (from a different type) to the initial arsenal of all factions
• Added more skin options to the SWAT faction (no beard, gaz mask)
• Added small damages on the Stun, Shock and Stinger grenade explosions
• Improved the size categorization of the generated maps
• Added a message explaning how to unlock items when clicking on them
• Added the available credits in the setup screen
• Updated translations

Fixes

• Fixed the planning version of some walls