ATS - Stacked SCS Lowboy Trailers (1.43.x)

- A few customizations now survive through F7 cycle (I'm still working to make more survive). (Some customizations of the base game are disabled because they never survive F7 cycle.)
- Wheel/tire customizations still will NOT survive.
- Paint jobs survive.
- Bodies survive (Wood-Rail, Full Wood, Wood w/Alum)

Some fenders and mudflaps survive (front & rear):
- (Front will not survive on configurations with JEEPS.)
- (Rear will not survive on configurations with SPREADERS.)
- Front bodies survive on configurations withOUT JEEPS.
- Bumpers with working reverse lights are available on configurations where they make sense. (e.g., trailers that use spreaders do not have reversing lights.)
- When you F7 from stacked to coupled, the coupled trailers automatically spawn with flags, strobes and a banner ('OVERSIZE LOAD' or 'LONG LOAD' - your choice).
- Cargoes that are long or oversized are labeled ( .. [LONG], .. [OS] ) to guide your trailer-configuration choice.
- Lowboy trailers have more descriptive names, and Trailer Manager is tweaked a bit to show those names.
- Stacked trailers accept all SCS base-game cargo, as well as Forest Machinery, Heavy, Volvo Const Eqp, and a few Oversize Cargoes IF you own the DLCs.
- Custom cargoes exist for ownable, freight-market, and traffic lowboys, and many SCS cargoes are branded (e.g., CAT, Doosan, Hitachi).
- Several custom cargoes exist among parked vehicles.

20 DEC 21 UPDATE:
- Freight-Market oversize lowboy trailers (including Special Transport) now have low banners AND beacons.
- AI (traffic) oversize lowboy trailers now have low banners. (I'm trying to get beacons on them, too,)
- (I'm still working to get more customizatrions to work.)
- (I'm still working to get flags onto oversize cargo.)

22 DEC UPDATE:
added low banners and strobes to oversize Lowboy market trailers.
added low banners to oversize Lowboy traffic(AI) trailers.

Authors: Eddie Yantz