Perseus is a problem because of the number of books. I don't want to see them unless I want to. So this is a way to make that happen. If you make a collection like this you do not have to see Perseus or Papyri which can be in the way.
The second screen shot shows that you can drag and drop the tab for the collection into favorites. Then all that you need to do is click on it to open the collection. You then have similar functionality as the Library window. If you want to further filter add parans around the rule and filter away.
