------------------
- Add support for drafted content preview for Dexterity content when request is
marked with IDisplayFormDrafting
[datakurre]
- Fix not set cookie values twice
[vangheem]
- Fix to always sync drafts before object modified event subscribers
(especially indexing) are called
[datakurre]
- Behavior shortname ``plone.draftable`` added.
[jensens, datakurre]
- Update testing infrastructure and fix code analysis errors.
[gforcada]