Add Buff info as mouse-over tooltip to "Stop buff mode"-button

[SmurfAsH]

As it is now, while in buff mode you can't see what buff you're using (for how long it will last).

Adding Buff info as mouse-over tooltip to the "Stop buff mode"-button would save some click once in a while.

[Durin_d]

Or show the selected buff stack with the number of remaining buffs next to or included in to the stop button