The purpose is to allow the user to have the opportunity to manage what is going to be send as reminders. He can now access to the template or create a new one when the type of reminder is email or sms. In case of a simple notification, a new text field is added to add custom content. Task ID-2191254 COM PR odoo/odoo#68443 UPG PR odoo/upgrade#2313 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>