Folder paths can get unreadably long very quickly in the left sidebar. I have two folders from Users\<user>\Desktop in my filtered folders, and you can only see the folder names up to Desktop\, so it's hard to tell them apart. I can think of a few possible solutions:
* Allow giving folders a nickname that would show in the sidebar - like Nickname (C:\Folder1\Folder2\Folder3)
* Right justify the folder names so instead of C:\Folder1\Folder2... you get ...Folder2\Folder3 in the sidebar
* Only show the end folder in the sidebar, i.e. Folder3
I like the first option best. I think the third would be vulnerable to a similar problem, if there are end folders with the same name.