New Primaries module

[flannelhead (Sakari)]

@europlatus

I had done more research and testing with RGB Primaries and the channel mixer, and I had come to the conclusion that the new module was equivalent to using the normalization checkbox in the channel mixer.

Well done and glad the response was also helpful.

@europlatus

There’s no switching between tabs, which helps to streamline workflow that bit more.

This was one of the reasons to implement this as a new module instead of just an alternative interface to color calibration. The other thing that makes this module very convenient is that it’s more obvious from the interface, which slider should you drag to take one primary to a particular direction.