sortedm2m is a drop-in replacement for Django's own ManyToManyField. The
provided SortedManyToManyField behaves like the original one but remembers
the order of added relations.

WWW: https://github.com/gregmuellegger/django-sortedm2m

PR: 205096
Submitted by: Kevin Golding <ports@caomhin.org>
Approved by: mat (mentor)
Differential Revision: D4628