... and SwAuthorityFieldType, which needs 2 lists of the fields because
each citation may occur multiple times, so their order might change on
deletions.

This is for when there is a bibliography in the document, and it is set
to IsSequence(), i.e.,
insert Bibliography -> Number entries -> Sort by document position...

Change-Id: Iba2c31267aeebacb779713567eeb0aa6659afefb