v6.0-alpha.27

* Fix data receipt policy defect

* Issue **#791** : Search completion signal is now only sent to the UI
once all pending search result merges are completed.

* Issue **#795** : Import and export now works with appropriate
application permissions. Read permission is required to export items and
Create/Update permissions are required to import items depending on
whether the update will create a new item or update an existing one.