Resolve "long instance name overlapping next column in footer"

Closes #1012

See merge request funkwhale/funkwhale!992

Cache API/media files with service workers

See merge request funkwhale/funkwhale!991

Progressive web application

See merge request funkwhale/funkwhale!983

Set up player config for mobile control

Document server migration process

See merge request funkwhale/funkwhale!989

See #973: playlists cards

See merge request funkwhale/funkwhale!988

Resolve "Adding album mixes up tracks if multiple discs present"

Closes #1006

See merge request funkwhale/funkwhale!984

Merge branch '1004-when-using-docker-compose-deployment-the-celerybeat-container-may-stumble-over-a-stale-pid-file' into 'develop'

Resolve "When using docker-compose deployment, the celerybeat container may stumble over a stale pid file"

Closes #1004

See merge request funkwhale/funkwhale!986

Resolve "When using docker-compose deployment, the celerybeat container may stumble over a stale pid file"

Use a dedicated scope for throttling subsonic to avoid intrusive rate-limiting

See merge request funkwhale/funkwhale!987

Fixed broken attachment fetching with long filename

See merge request funkwhale/funkwhale!982

Resolve "Player toggles play when tracks navigated in a pause state"

Closes #970

See merge request funkwhale/funkwhale!981

Resolve "Remove the unused `federation__music_needs_approval` settings"

Closes #959

See merge request funkwhale/funkwhale!980