ETS2 - Man Tgx And Tgx Euro 6 Dashboard Colors V1.0 (1.38.x)

- Add background colors to MAN TGX and TGX EURO 6 dashboard
- Add colors to the speed gauge (green from 60 to 80 and orange from 90 to 100)
- All the function keys on the dashboard have been colored

Authors: GA071MA