Flip button for Constraints

A lot of the time when i make constraints its for referrals from one actor to another and a button inbetween the CHANGETHIS to THAT to have the two flip around would be nice.
I know it doesn't take too long to just switch it but it would be better.
*ps i regret the poll
I know it doesn't take too long to just switch it but it would be better.
*ps i regret the poll