Layer properties/color/clicks

Two clicks are required to set a color in layer properties. It's then possible to click on one color and click on a second color, window will close with the second one. I suggest to require only one click.

If you click on pallete (=> by the way 'Palette') opens a second palette. Clicking 'ok' shuts both windows (not always ?)

It could be better to keep only one palette ?