PURPOSE
Concatenate feedback message and tracking when marking a lead as lost. This
currently generates 2 consecutive message about the same change, having a
single one is better from an UI point of view.
SPECIFICATIONS
Allow to link a body to a value change tracking. Tracking is currently done
by accumulating changes in a structure (see ``env.cr.precommit.data`` usage
with ``mail.tracking.<name>`` key). In the end those values are used to
generate a message with tracking value and a subtype.
In this commit we allow to manually set a body used as a message for the
tracking message, adding a new ``mail.tracking.message.<name>`` key. It is
used when posting or logging the tracking message, simply propagated as body
to ``message_post`` or ``message_log``.
In crm we use this when losting a lead through the dedicated wizard. A bit
of custom html allows to have a nice display.
Task-2671709
Part-of: odoo/odoo#78648
Thibault Delavallée
1341d52540