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Breaking changes:
- Update for Plone 6 with Bootstrap markup
[agitator, ale-rt, ladplone, mliebischer, pbauer, petschki, santonelli] (589)
Bug fixes:
- Various fixes for restoring references:
- Migrate ``relatesTo`` AT relation to ``relatedItems`` DX relation.
- In DX check the schema to see if relation field is list or item.
Taken over from `collective.relationhelpers <https://github.com/collective/collective.relationhelpers/>`_.
- ``restore_references``: accept ``relationship_fieldname_mapping`` argument.
This must be a dictionary with a relationship name as key and fieldname as value, instead of always using ``relatedItems`` as fieldname.
[maurits] (510)
- Use python statements in templates.
[pbauer, mliebischer, ladplone] (579)
- Catch AttributeError for ``getNextPreviousEnabled`` during migration.
[maurits] (582)
- migrate_datetimefield: do nothing when old value is None.
This fixes ``AttributeError: 'NoneType' object has no attribute 'asdatetime'``.
[maurits] (584)
- Fix condition in ``document.pt``
[petschki] (596)