You can now remove spells from "favourites!"

[BB Shockwave]

I only noticed this when working on a language mod ('cause the translations are atrocious).

Basically, right-click on any spell you want to remove from your favourites, and it will disappear. The other spells on your list will "slide up" and the next most often used spell will appear in the last slot. This is an awesome way to finally get rid of spells you are no longer using from the list.