New client button request - attack next mob

[Gambit]

Since people are messing about with that old thing here is a request for toons with sh/sh2

Say you are penting and surrounded by 4 mobs, instead of turning to a new mob after each is killed, you can press this button to turn to the next mob when the original one is at <50% and the surround hits will take care of them. Any melee saves a ton of time doing this it is just annoying to have to target-attack when the game already has functionality maintaining aggro lists.