Hotfix for B890

Just quick fixes without changing the build number. Update your servers please.

[fixed] can select invisible heads

[fixed] princess03 map having wrongly placed end

[fixed] possibly the osx collapse crash

[modified] reduced fall damage by half

[modified] lowered wave respawn in TTH to 8

[added][server] sv_gamemode = TTH switches to WAR automatically

[added] specific crate unpack help
[added] help message for help messages :p

[removed] competetitive/cooperative buttons from servers browser
[added] sorting by player count as default in servers browser