Hmmm, ok — that’s useful context. But if anything, it suggests that removing this makes even more sense given that there wouldn’t even be a “none” to worry about. Just let category color be a setting for all the places it is used, and don’t worry if one place that it might not be used is selected?
For what it’s worth, I’m actually using “none” with Category Icons, which I think would also work decently with the sidebar.