Purpose
=======
Currently the application will display a 404 error message, if the mail
plugin module is not installed or if the user made an error in the URL
of his Odoo database, which is confusing for end users.
So, we show an error message during the authentication process if the
database is not reachable and we should add the translations related to
those changes.
Task-2577531
See odoo/mail-client-extensions/pull/17
closesodoo/odoo#75637
X-original-commit: 3c00fddb99091b96259eed1e45ef9de53c53f795
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>