D-Range clip normalization --> Luma Clip & Color Clip

[marcinz606]

I have been fighting with color casts on some negatives and after a lot of fiddling i found that increasing D-Range clip to max gets rid of them very efficiently but also it compresses the output (clipped highlights, crashed blacks). I started experimenting with separating color normalization & luma normalization into separate controls and got big improvement overall, especially with more difficult negatives. Expect it to land in next release!