Support org.gnome.Mutter.DisplayConfig.{Set,Get}CrtcGamma
Based on !55 (merged) which should go in first. Setting gamma is supported with this update to wlroot:
This needs https://github.com/swaywm/wlroots/pull/1059
Makes nightlight work via g-s-d, g-c-c.
Edited by Guido Gunther