remove ArtistCredit loading in Edit::Work::Delete
Removing tracklist trigger
Merge branch 'mbs-6023-master' of https://bitbucket.org/warp/musicbrainz-server into area-test
Merge branch 'mbs-799-ui-5920' of https://bitbucket.org/ianmcorvidae/musicbrainz-server into area-test
Fix button alignment in rel editor dialog
Fix clear button in AC lookup
MBS-5920: fix release add/edit display, initial steps by reosarevok
display disambiguation comments in the rel editor
Merge remote-tracking branch 'warp-bitbucket/mbs-6023-master' into mbs-799-ui-5920

* warp-bitbucket/mbs-6023-master:
  MBS-6023, display tracklists correctly for Add/Remove medium edits.
  MBS-6023, Remove dead code in release editor.
  MBS-6023, First set of track identifier changes in the release editor.
Merge remote-tracking branch 'reosarevok-bitbucket/area-test' into mbs-799-ui-5920

* reosarevok-bitbucket/area-test:
  MBS-5920: fix release add/edit display, initial steps by reosarevok
  Removing tracklist trigger
  Fix some references to country
  Adding area merge stuff
  Making work delete stop loading ACs
  Works don't have artist credits (and DB stuff is being dropped anyway)
  Improving release event display + loading empty country on add
  Changing the order of stuff in the RE to be the same as it's now
  Merging warp's stuff, some extra fixes
MBS-799/MBS-5919/MBS-5920: fixes to fks script and upgrade.sh
Kill the placeholder plugin.
Remove false comments
Fix some erroneously-kept tables/columns
redo webservice.sql: Re-add warp's webservice.sql, apply ollie's changes, re-fix everything for this branch.
Schema change: assorted fully-merged schema changes to review.
MBS-6023, fix release editor, add disc -> existing tracklist.
MBS-6023, fix release editor, add disc -> existing tracklist for track identifier changes.

Before we got rid of tracklists, the recording associations tab could
suggest the recordings associated with a tracklist when the "existing
tracklist" feature was used to add a disc to a release.

But "existing tracklist" cannot set the medium_id for the disc to an
existing medium, because that would mean the medium would get attached
to multiple releases.  To communicate from which medium the tracks
were loaded a "medium_id_for_recordings" field was added to the
tracklist form, it is read by the recordings tab to associate
recordings with those tracks.
Merge branch 'mbs-6023-master' of https://bitbucket.org/warp/musicbrainz-server into area-test
Order Edit release the same as Add release