Bring back the GSX paintjob saving

[OmarUVX]

I am bored from coloring vehicles manually, since i was using the 2.0 and 3.2 versions together so i can use 2.0's vehicles paintjobs saving option.

[user-grinch]

I don't think I'd be doing a GSX-based saving but rather a model based on ( Similar to how it works in 2.2/2.3-wip). But no ETA on that atm.