[Feature Request] Allow changing vision saturation

[Illuxiem]

Using ATL.sight.saturation will change the slider but not actually apply any effects. Foundry v12 Dnd 3.3.1

[dev7355608]

I locked it down, because of there was some issue I don't recall at the moment with the the automatic selection of the vision mode. I could revisit this in the future, but probably not in the near future.