Collapse library groups by clicking on group titlebar.
Love that we can now create library groups. However, in order to collapse/expand a group, we can only click on the little arrow. It would be nicer if we could click, or double click on the group title-bar to make collapsing/expanding faster. That arrow is little and takes extra time to make sure you're right on top of it if you want to expand/collapse a group.
John Fisher commented
Perfect! 25 bonus points if we also get an expande/collapse all groups button.