Ghost pickers

[FiratUsta]

Adding ghost pickers could really make picking colors for a palette easier. The idea is to add more pickers to the color wheel that are not intractable, but positioned automatically by the current hue/tone/analogous options. The non intractable nature of them should be very clear to the user, so they'll probably be darker/transparent, hence the name.

Should be a simple enough addition, though I am worried about the performance cost. But if it passes the 10 year old laptop test, it should be fine.