Colorific Copy Context Menu

So I'm adding a context menu to the foreground and background selectors to make getting colors from the app easier. This is the first real native integration I've added to the app so it's been kind of slow going.

I've been thinking about adding a paste option here as well, but the issue then being that I would need to validate that whatever is getting pasted is a valid color, which makes for a very awkward fail state.