How to create playlist in Musicbox default web interface

I’ve been exploring the default web interface with musicbox and I can’t for the life of me figure out how to create a playlist.
I saw that 4 years ago this was an issue and the response was ‘there is no playlist manager…yet’…
Um, has this been developed?

I create my playlists with an simple editor (UltraEdit32).
For example here are 4 entries from my playlist named sampler.m3u:

Network/Jazz/Eriksen, Torum/Visits/01 Beat Angels.flac
Network/Frauen/MacLellan, Catherine/Water in the Ground/01 Catherine Maclellan - Take A Break.flac
Network/Männer/McCartney, Paul/Flaming Pie/06 Paul McCartney - Calico Skies.flac
Network/Männer/Nash, Johnny/The Best Of Johnny Nash/01 Johnny Nash - I Can See Clearly Now.flac

Network is my mount_address from the settings file:
mount_address = //

When i have stored the playlist at my windows-pc I send it with WinSCP to the (running) raspberry to the location /var/lib/mopidy/playlists.
After rebooting the raspberry my new playlist is seen in the Playlist menu.