Is your feature request related to a problem? Please describe.
I dislike having to click a menu to see bookmarks, when they could simply be in list view.
In places view i hate having to click on the directory to see subfolders and then have to move to the right to click on subdirectories

Describe the solution you'd like
Add tree view to lists view or add a quicklaunch bar (like windows) to tree view. I would also like to see network and other subcategories