Black Forest Sunset

[Popanz (Uli - using AgX)]

I use this version with the AgX module from @kofa:

Blender AgX in darktable (proof of concept)

A new build: rebased on top of darktable master, includes commits up to and including b67d715c7; I’ve moved the primaries from preset combo + apply button above base primaries, as the loaded values apply to the base, as well some parameters are now percentages, as mentioned above; migration is provided by the new version. Most of the other changes should be invisible; I’ve addressed review comments and did a bit of clean-up. @MStraeten , @priort , @Dave22152 , please update your builds. Sin…