As this feature exists in the ios app, I figured it was some type of bug causing it not to work on the desktop app. Then I saw a "Solved" post from April, saying the feature was coming soon. Well. It's October. It's not "Solved."
Not all of us stay online with our computers at all times. I was about to kill all of my playlists, as they are all just albums anyway (for the most part) so I can play them offline. It's impossible to find the actual playlists in there with so many albums..
I know I'm not the only one. Please help.