CONFIG: Add Display Correction Abstraction Group

[sobotka]

Currently, correcting for colour critical work via a 3D LUT is possible with OCIO, but messy organizationally. If wrapped up into a View transform, the parcel makes it even more challenging to properly colour manage UI widgets and other things. If wrapped up as a Look, it seems somewhat odd semantically.

It might be worth considering how to provide an abstraction grouping that clearly identifies corrections, and properly keeps them in the stack in a discrete fashion.