0454: Improved reverse BGA tipping
1.  Change direction if we drive to far and re position.
2.  Always turn on AWD on MR vehicles when reversing inside the BGA. (Helps allot when reversing on the ramp.)
3.  Always use the rear tipping if possible. #386
4.  Make sure we make a nice ramp and don't unload more in a ramp section that it's allowed.
5. Fixed support for Claas Quantum 3800K, which got the wrong frontNode.