[IMP] - compute date end onchange date start for auto-renew sale order lines

product_contract/views/product_template.xml

@@ -21,6 +21,7 @@
             </xpath>
             <xpath expr="//notebook" position="inside">
                 <page string="Contract"
+                      name="contract"
                       attrs="{'invisible': [('is_contract', '=', False)],}">
                     <group>
                         <field name="contract_template_id"