MBS-7024: Truncate updates in replication packet 72901

replication-72901 contains an insert/update to release_group with a
release group name that is 12k characters long. However, we also have a
functional index on musicbrainz_collate(name), and for versions of
libicu at least >= 4.8, the result of musicbrainz_collate(name) is
larger than what can be stored in PostgreSQL indexes (older versions of
libicu produce a smaller result and can load this replication packet).

To work around this problem, the offending large insert/update column
has been hard-coded to be truncated to 1000 characters, which allows
replication to continue.
MBS-7024: Also rewrite seq ID 111404809
MBS-7036: Improve alignment of old/new fields in some edit diffs

Changes the colspan of edit display tables that mix
one-column/two-column table rows. Many edit view templates are already
using correct colspan, this fixes the rest.

Examples demonstrating a readability improvement:

Edit area:          https://musicbrainz.org/edit/22694954
Edit cover art:     https://musicbrainz.org/edit/23241103
Edit label:         https://musicbrainz.org/edit/23205451
Edit recording:     https://musicbrainz.org/edit/23241830
Edit release group: https://musicbrainz.org/edit/23237236
Edit work:          https://musicbrainz.org/edit/23233621
Merge remote-tracking branch 'intgr/master' into beta

* intgr/master:
  MBS-7036: Improve alignment of old/new fields in some edit diffs
Merge remote-tracking branch 'ocharles/mbs-7024' into beta

* ocharles/mbs-7024:
  MBS-7024: Also rewrite seq ID 111404809
  MBS-7024: Truncate updates in replication packet 72901