Blender Git Loki

Fix T73482: Context Menu on any button is broken

What I removed here used to be needed in an earlier version of the
patch, to avoid use-after-frees. This is not the case anymore, so it
seems we can remove this.

Generally the context region code is very weak and inconsistent. If
things were done properly, the line I added shouldn't cause issues -
it's logically correct.

Also fixes T73475.