Fendt Trisix update v2.1

Fendt Trisix update V2.1:
- File reduced to 76mb (instead of 130mb)
- Now compatible with courseplay
- Ability to be locked down when on a trailer
- Correction of a small error with crab steering function
- Color choice Washable! No Errors in log!

Please note that the crab steering function does not apply with row crop tyres and floaters tyres. The wheel steering on the rear axis is disabled on these two wheel configurations (due to the size of the wheels)

Credits:
FS17: dufffr, qwares17, DemonbobR, Repi and TSL.
FS19: Rico, ITSSDOT (THE man: 3D rework, lights, PTO, bug corrections & XML fixes) Eagle355th, KOTmods, SpawnFarms and Ritchie Smk (tester)