[IMP] event_sale: Hide 'price_reduce' in group_no_one
[IMP] event_sale: Hide 'price_reduce' in group_no_one

This is a technical field corresponding to the discount amout to apply on a
ticket from a pricelist. As no form view for event.ticket was defined before
we added one to customize it.

ygol/odoo,hip-odoo/odoo,dfang/odoo,ygol/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,dfang/odoo,dfang/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo