- DIRT_GLOBAL_MODIFIER is a global modifier to dirt generation
- second cleaning button in menu now orders entire team to clean their guns
- global overheating modifier now also multiplies attachment modifiers
- cleaning kits always use up 1% on use


git-svn-id: https://ja2svn.dyndns.org/source/ja2/trunk/GameSource/ja2_v1.13@5913 3b4a5df2-a311-0410-b5c6-a8a6f20db521