New parameter inside aircraft.cfg

Hi, It’s very unrealistic when we have installed some unique classic aircrafts
and, when we are taxing, you see it repeated two or three times in the same
parking with the same livery. Would be nice to have an option in the livery
configuration to show it only one time when is AI stationary aircraft.
Something like “Unique=1” inside aircraft.cfg. Thanks for all :slight_smile: