Created attachment 158122 [details]
This is just some concept art to illustrate my idea/request.

Playlists are essential for playing music in almost any audio player. I believe that Elisa would benefit from a playlist manager greatly.

So my idea/request is to add a playlist manager. In some audio players, such as DeaDBeeF or foobar2000, there is a horizontal playlist manager with tabs available. 

The option of such a playlist manager would make Elisa more attractive for many users.

The attachment shows how Elisa could possibly look like with such a horizontal playlist manager with tabs. I just copied the layout of another audio player into Elisa to illustrate the concept.

If a horizontal playlist manager with tabs is not feasible for Elisa, there would also be other options available, such as a dropdown menu playlist manager to quickly change between playlists.

(My original feature request can be found here: https://bugs.kde.org/show_bug.cgi?id=468407. 
This request helps to split things up.)