UI Lists has some buttons at the bottom related to sorting. One button
sorts in alphabetical order, the other reverses sort order. But when
both buttons are enabled you don't get reserved alpha. Contrary to what
the buttons show, enabling "reversed" turns off alpha sorting so you
just get a reversal of the natural order. This button fixes that so you
can reverse both natural and alpha sorted lists.
Pull Request: https://projects.blender.org/blender/blender/pulls/132578