This is a very serious work issue for me as I have always worked with Library in a panel and half its size was taken away with the Collection drop down menu in 5.0. I'm re-requesting that space be restored and that it can be done easily by removing the Browse button and making the Prioritize button a switch to open/close its panel in the same way that the Info button works
Here is my original plea (for those who have access to the forum) http://community.logos.com/forums/t/56461.aspx
NB. on my laptop (1366 x ?) there is no room between buttons/icons. On my desktop (1680 x 1050) there is space between the Info and Browse buttons, but laptop is my main work station.