Only one empty playlist is shown

[532910]

Steps to reproduce:

1. Select item, Add To Playlist -> New Playlist -> test1
2. Go to test1 playlist, Delete item. (test1 playlist will be shown with 0 tracks)
3. Select item, Add To Playlist -> New Playlist -> test2
4. Go to test2 playlist, Delete item. -> test1 playlist become hidden!
5. Delete test2 playlist -> test1 playlist become visible again!

• [x] I carefully read the contribution guidelines and agree to them.
• [x] I checked if the issue/feature exists in the latest version.
• [x] I did use the incredible bugreport to markdown converter to paste bug reports.

[Stypox]

Can confirm.

[yamatt]

Multiple empty playlists seem to cause one of them to hide. Then when a video is added to the visible playlist the hidden one reappears.