Ahh well. Thanks for the reply.
If by hidden buttons you mean you can get those nested elements to make themselves completely transparent except on mouse-over, that would probably still be a huge improvement.
The main problem I'm having is losing all that realestate on the side of my screen. Track groups by con color and then* name - so one type of mob could be in more than one spot on the list. Because of this, at the times I need to have it open, I often have to have it stretched quite large already, so any little bit of space savings helps.