Website quote gave the possibility to define an email template to use
when sending a quotation / sale order by email. This was done at a time
where doing correct templates in sale was difficult to do / implement.
Now send by email template is completely inside sale module and should
cover all use cases.
Having a settings to customize it is not considered as necessary as it
can be customized easily.
This commit is linked to task ID 1843171 (and 1868112) and to PR #25293
(and #25889).
We also:
- reorder a bit the form view for quote templates
- change the way default templates are selected for sales order
(inactive quote templates are not selected) while keeping
customizability through ir.values