I have added the ability to move messages from one
ticket to another (see attached patches).
It often happens in practice, that a new ticket arrives,
which belongs to an existing ticket, or the other way
round, that a mail is assigned to an existing ticket,
which should be better a new one.
In the start field of the form enter a python index (0 ...
first message, 1 ... second, -1 ... last, -2 ... before last).
The form appears on the MailManager instance home
page. A totally inappropriate place. It is a quickshot, but
moving messages makes our life with MailManager so
Hopefully a similar feature with adequate presentation
layout will be included in one of the next releases.