Low deck chassis addon for SCS Renault Range T v1.2

Changes v1.2
- Added new type of fueltanks.
- Added new spoiler for High cab.
- Fixed shadow on Sleeper raised spoiler.
- Fixed rear fenders position for last steam version.
- Added UI icons by m1keY.

v1.1
-Added 3 types of small fueltanks.
-More realistic big fueltanks chassis.
-Moved the 5th wheel 1 bolt forward.
-Added raised spoiler for Sleeper cab.

v1.0:
-Added low deck rear top fenders.
-Added low deck rear mudflaps.
-Added low deck front chassis fenders without mudflaps.
-Added raised spoiler.