[FIX] mail: escape canned responses
[FIX] mail: escape canned responses

Create a canned response containing the character "<". It is
automatically converted into "&lt;".

The substitution field is systematically escaped, for security reason.
This causes the substitution observed. However, the canned responses are
only used in text-only messages. The escaping is therefore not
necessary, since the HTML is not interpreted.

opw-693970

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