Enable A/B Comparison to keep Denoised Render Buffer

[Frez121212]

Right now A/B comparison only keeps Beauty Render buffer even if you're viewing Denoised Beauty Render buffer. It'd be nice to be able to keep the Denosied version for the A/B comparison instead... or to keep whatever render pass is active in the live viewer when the "Store Render Buffer" button is pressed.

[Agendum]

Id like this too.

[nejck]

+1