[IMP] mail: improve the help tooltip of auto_delete field

Currently the message for help tooltip of auto_delete field is not sufficiently
clear for user to understand.

In this commit, improving message for help tooltip by adding some extra details
in it so user can easily understand about it for models mail.mail, mail.template
and wizard mail_compose_message.

Task-2055702

Closes https://github.com/odoo/odoo/pull/45063

closes odoo/odoo#45063

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/mail/models/mail_mail.py

@@ -52,7 +52,7 @@ class MailMail(models.Model):
     ], 'Status', readonly=True, copy=False, default='outgoing')
     auto_delete = fields.Boolean(
         'Auto Delete',
-        help="Permanently delete this email after sending it, to save space")
+        help="This option permanently removes any track of email after send, including from the Technical menu in the Settings, in order to preserve storage space of your Odoo database.")
     failure_reason = fields.Text(
         'Failure Reason', readonly=1,
         help="Failure reason. This is usually the exception thrown by the email server, stored to ease the debugging of mailing issues.")

addons/mail/models/mail_template.py

@@ -130,7 +130,7 @@ class MailTemplate(models.Model):
                                       'attachment_id', 'Attachments',
                                       help="You may attach files to this template, to be added to all "
                                            "emails created from this template")
-    auto_delete = fields.Boolean('Auto Delete', default=True, help="Permanently delete this email after sending it, to save space")
+    auto_delete = fields.Boolean('Auto Delete', default=True, help="This option permanently removes any track of email after send, including from the Technical menu in the Settings, in order to preserve storage space of your Odoo database.")
 
     scheduled_date = fields.Char('Scheduled Date', help="If set, the queue manager will send the email after the date. If not set, the email will be send as soon as possible. Jinja2 placeholders may be used.")
 

addons/mail/wizard/mail_compose_message.py

@@ -137,7 +137,7 @@ class MailComposer(models.TransientModel):
         'wizard_id', 'partner_id', 'Additional Contacts')
     # mass mode options
     notify = fields.Boolean('Notify followers', help='Notify followers of the document (mass post only)')
-    auto_delete = fields.Boolean('Delete Emails', help='Delete sent emails (mass mailing only)')
+    auto_delete = fields.Boolean('Delete Emails', help='This option permanently removes any track of email after send, including from the Technical menu in the Settings, in order to preserve storage space of your Odoo database.')
     auto_delete_message = fields.Boolean('Delete Message Copy', help='Do not keep a copy of the email in the document communication history (mass mailing only)')
     mail_server_id = fields.Many2one('ir.mail_server', 'Outgoing mail server')