odoo/odoo#196412

Created by Discuss, Didier Debondt (did)
Closed
label
odoo-dev:master-restore-composer-mention-did
head
b1b257205d85e665fc4bc8c51dbadebd77b7559a
odoo/odoo
master #196412

[IMP] mail: save mention in composer draft

Before this PR, mentions where not stored in the localStorage for drafted
composer.
This PR adds/and restore the mentions for the composer.

task-4547310