* = sale, purchase
PURPOSE
Purpose of this commit is to improve the 'Pay Now' notification template
used notably when using the "Send by email" button on
* invoices
* sale orders
* RFQ and purchase orders
SPECIFICATIONS
Global specifications
* remove gray background that is around the white content (aka have an
email with an uniform white background);
* move button on top of email like other notification templates (top-left
and company logo is top-right);
* fix various small wording issues;
* fix signature usage;
Technical specifications
Remove custom definition of access links and labels in 'Pay Now' notification
template (``mail_notification_paynow``). It is now done at model level through
the ``_notify_get_groups`` that is generic to notification emails. This allows
to remove QWeb override in purchase and sale notably. Displaying access links
is now controller by the ``has_button_access`` value. Model computes links,
access and labels while view only displays what is requested. That way any
template can use those values instead of being defined in a template subject
to user changes.
Sale / Purchase
Overrides of those modules is not necessary anymore since button labelling
and URLs are managed at model level.
Purchase "specific" buttons for Accept / Update dates are now email layout
actions, like used in other modules like HR or Project.
Continuation of odoo/odoo#76418 .
Task-2712450 (Mail/Sale: Improve 'Pay Now' notification template)
Part-of: odoo/odoo#82167