This commit revamps the event template form to be similar to the event form itself and removes unnecessary fields, purpose is to give more clarity to the user. It also fixes the order of the fields in the event form to be exactly the same as in the front-end, so that the user don't get confused. Task-2541208 closes odoo/odoo#71856 Ent-pr: https://github.com/odoo/enterprise/pull/19128 Upg-pr: https://github.com/odoo/upgrade/pull/2516 Related: odoo/enterprise#19128 Related: odoo/upgrade#2516 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>