Please add a linear option to "working color space"

It can especially be useful for certain compositing effects, specifically in an HDR project. For example, if you have something that is at the full 10,000 nit brightness, and you set that at 50% opacity against a black background, you should expect 5000 nits. Instead, you get 92 nits because it's working in the original PQ space for those transformations.

Working in the PQ space can be useful for plenty of workflows, but for some specific needs, being able to do color calculations in linear space can be very helpful. There used to be an old "Composite in linear color" setting, but it doesn't seem to do anything anymore when I tried it in SDR, and it's completely greyed out in HDR.