It's just the default pet bar you get when you create a group and choose the 'pet bar' template. Specifically in Kara on the chess event, the first icon, looks like the claw, the second one, the trailing paws, and the third one, don't know exactly what it is, they appear on the bar, and they function perfectly, the problem is there is no tooltip being generated. And in the chess event, depending on which unit you use, the actions of the first three buttons vary.
That's unfortunate. I've grown quite accustomed to using IB2.
I've become accustomed to it as well. This is the second abandonment of this addon. A bit saddening. Hope jjsheets' is ok.