BUGFIX: Spawning of a transport vehicle while a menu is open was confusing the mouse.
BUGFIX: Fixed screen/window issues.
BUGFIX: Some engine fixes.
BUGFIX: Fixed artificial intelligence sometimes not seeing the vehicle in front.
BUGFIX: Some collisions were missing.
BUGFIX: Racks were considered as walls.
IMPROVEMENT: Vehicle spawn time decreased.
IMPROVEMENT: Product masses revisited.