MBS-2782/MBS-2848: don't expand (in Add Medium) or show (in Edit Medium) artist credits where all changes are visible; also, condense and visually separate expanded display
MBS-5524: fix up display_data to always return link_type
MBS-6296: don't show non-functional alias editing links for non-location-editors (or logged-out users)
MBS-6296: inline the disallow_editing logic
MBS-6349: s/\.tracklist// to display artist credits
Merge branch 'mbs-6349' into mbs-2782-2848-artist-credit-edit-display
MBS-2782/MBS-2848: make hash_artist_credit function private, export variants, kill >
MBS-2782/MBS-2848: use whitespace for visual hierarchy
Merge branch 'beta' into mbs-5524-redux

Conflicts:
	lib/MusicBrainz/Server/Edit/Relationship/EditLinkType.pm
MBS-3427: actually validate CDStub submissions before trying to insert them
Fix rollup replication to work properly alongside GPG.
Merge branch 'mbs-6349' into beta

* mbs-6349:
  MBS-6349: s/\.tracklist// to display artist credits
Merge branch 'mbs-3427' into beta

* mbs-3427:
  MBS-3427: actually validate CDStub submissions before trying to insert them
Merge branch 'fix-rollup' into beta

* fix-rollup:
  Fix rollup replication to work properly alongside GPG.
Merge branch 'mbs-5524-redux' into beta

* mbs-5524-redux:
  MBS-5524: fix up display_data to always return link_type
Merge branch 'mbs-2782-2848-artist-credit-edit-display' into beta

* mbs-2782-2848-artist-credit-edit-display:
  MBS-2782/MBS-2848: use whitespace for visual hierarchy
  MBS-2782/MBS-2848: make hash_artist_credit function private, export variants, kill >
  MBS-2782/MBS-2848: don't expand (in Add Medium) or show (in Edit Medium) artist credits where all changes are visible; also, condense and visually separate expanded display
Merge branch 'mbs-6296-area-alias-editing' into beta

* mbs-6296-area-alias-editing:
  MBS-6296: inline the disallow_editing logic
  MBS-6296: don't show non-functional alias editing links for non-location-editors (or logged-out users)