Feature request - integration of palette tool and transformation axes and other features

[pierrelabreche]

It would be convenient to enable the integration of selected palette colors with the applicable transformations.

For example if a palette color patch is selected for visualisation in transformations, then the patch attributes such as RGB values, HSL values, HSV values would be highlighted in the controls. That is axes and points.

Example controls include color curves, gray curves, color picker, HS transformation bins, conditional curve axes, etc.