Manage / remove colors from material picker#562

So I only use a full colors, including a few custom ones I’ve added to the Materials picker. But I find it a bit annoying to see “Deep orange” next to “Orange” and really just want to see the colors that I actually use on this picker.

So, it’d be nice to be able to manage the colors that appear in the picker so that I can remove the colors I don’t want and of course still add the custom colors I use. Just a small timesaver.