TrackMania United Forever Patch #2

Here is a fix (optional patch) for the game about various things like:
-improved checkpoint time deltas
-closing of application in laps mode
-hide to close modified in cam 3
-force opponent visible keep hide to close and set number
-very high shadow problems on some graphic boards
-reflections in desert water in more configurations
-259 to 260 medals crash removed
-fixed map browsing of personal campaign
-stereoscopic additional modes
-spectator cam fixes
-maniacode play_track on same track working
-update custom challenge score at download
-various small interface glitches