If I have my groups organized in a certain way, opening the group and closing it when I'm done puts it back at the top of the groups, which may be less than ideal. Maybe a way to pin certain named groups to a certain positional order would be nice? And it may be nice to be able to right-click a group tab and file away the group, back to where it came from. Not sure if this is the best idea though, and a 2nd opinion would be great!