It was on my bar as a completely separate action when the hotbar first swapped, a 45 second cooldown version instead of the normal 120 second one, with a different color scheme on the icon, red and gray instead of the normal blue and red. I couldn't find it again after I unbound it. So either it's unintentionally there and shouldnt be on pvp hotbars, or is implemented and isn't where it should be.