* [CHD-2598] [Mail/Merge/Usability] When opening the merge popup from a ticket profile, an autocomplete field is now provided to quickly look up records by partial mask or subject.  Previously, the ticket chooser always had to be opened and searched.
* [CHD-3618] [Debug] The debug report now shows the engine and record count for every database table.  This is useful when sending debug reports to the development team for support.
* [Debug] The debug report now displays usage information about the following PHP extensions: tidy, XCache, XDebug, memcache, memcached, and redis.
* [Setup/Workers/Usability] Added an '@Mention Name' field to each worker. During the upgrade this will default to the worker's first and last name with no spaces. This will enable new functionality like quickly notifying workers from a comment.
* [CHD-2630] [CHD-3183] [Comments/Notifications/Usability] When commenting on a record from a peek popup or its profile, workers can now be selected to receive notifications by using the '@mention' syntax in the text. This has the added benefit of also organically documenting which workers received notifications about the comment, and it also makes it easier for a notified worker to see which comments need their attention. The same feature is also supported on sticky notes.  This replaces the "Also notify these workers" option, which required workers to be selected as an extra step.
* [Contacts/Comments] When viewing a contact person record from a peek popup, a comment can now be added.  Previously this required viewing the full profile page.
[Code Cleanup]
6.8-dev checkpoint