Currently, it is possible to have a song with only the OnSong data. However, this stores the lyrcis with interspersed chords (keys), so that a full-text search doesn't work anymore. We need to
[x] make the lyrics field mandatory again
[x] provide a feature to convert onsong data back to lyrics
Currently, it is possible to have a song with only the OnSong data. However, this stores the lyrcis with interspersed chords (keys), so that a full-text search doesn't work anymore. We need to