Thunderbird 45.2 Beta 1
* Email without HTML elements was sent as HTML, despite "Delivery Format: Auto-detect" option
* Options applied to a template were lost when the template was used.
* Contacts could not be deleted when they were found through a search
* Views from global searches did not respect "mail.threadpane.use_correspondents"
* When entering members into a mailing list, the enter key dismissed the panel instead of just moving onto the next line