Add a "remove" or "none" option to the Label feature

I used labels in my stringout to differentiate between topics, which was really helpful. But now that I'm moving into my next edit, I want to be able to remove those color classifications. I've never worked with an add-on feature that didn't allow you to remove it once added. The option to remove this label would add a lot of flexibility to people's workflows and I've seen it posted one external boards as well.