Prioritize explicit PI ref over PHOTON_INHERIT

[noble-ux]

Ideal Behaviour

Vehicles with the following code should pull a predefined PI config if available:
HasPhoton = true, Photon = "PHOTON_INHERIT"

Actual Behaviour

Currently this script will prevent a photon config from using a predefined PI config. Currently this code actually needs to be removed in order to utilize the PI config without referencing it directly as seen below:
HasPhoton = true, Photon = "sgm_fpiu20"

[JoshPiper]

Not a bug? Intended behaviour is to leave blank with those.
Registered PI isn't indexed by model, so that can't be used automatically pulled.

[noble-ux]

We can move it around so
explicit PI ref (table or name) > default > inherit

Partial documentation issue, but ideally PI lighting would always be set to on when a model with a referenced PI is being used.