Separator(s) ? Rated 5 out of 5 stars

Very nice skin, thanks for keeping it updated !
I just have a question : how to make the separators visible ? I'm quite missing this feature, especially for folders in the bookmarks toolbar. I searched the jar and found several css files with the word "separator", but there are too many places with the word "separator" !

This review is for a previous version of the add-on (1.9.2).