* [CHD-3919] [Web-API/Tickets] In the Web-API, the 'group_id' and 'bucket_id' fields on ticket records can now be updated.
* [CHD-3922] [Web-API/Mail/HTML] Mail HTML templates can now be created, updated, searched, and deleted through the Web-API.
* [CHD-3922] [Web-API/Mail/HTML] When composing and replying through the Web-API, the 'content_format' and 'html_template_id' options allow HTML formatted mail to be sent.
Merge branch '6.8.2' into stable