After the N'th time forgetting to bind something, I'm making it a feature request: That the tooltip for anything that requires binding and isn't currently bound, should explicitly say "Unbound". Ideally in colored text.

ETA: And, no, the absence of a bit of text which is otherwise so common as to be "invisible", is not nearly as informative as an explicit warning.

Unwanted. Invalid. Close. (I actually implemented it and Nut rejected it (The PR is still open BTW, changed to your liking)).