I know it's Friday, so I'm probably just missing it, but where (for the love of all things holy) is the permission that enables/disables the prioritization thing?

I'm specifically talking about forum threads here, but it may apply to a larger audience. I want to grant this permission to a subset of users on nearly all of our forums.
We're on version 11.x if that matters to the answer in any way shape or form.
 
				 
		 
					