This update modernizes how several Odoo apps calculate and order mail-related interface data behind the scenes. It should make the codebase easier to maintain while keeping the user experience largely unchanged.

Task-2985304

Community: https://github.com/odoo/odoo/pull/100313

The signature field used in Sign has been updated as part of a behind-the-scenes modernization. Related automated checks were adjusted so the signing experience continues to work reliably for users.

Forward-Port-Of: odoo/enterprise#31445

Forward-Port-Of: odoo/enterprise#31445

The button on follow up reports does not change color when displaying next follow up. Steps: - With two Customers Invoices in need of action in follow up reports - Select the first one and do an action (send email) - Mark as Done -> On the next follow up, the button Send Email didn't change color, it should be back to primary. Remove the class 'btn-primary' when displaying the next follow up. opw-2844518 Forward-Port-Of: odoo/enterprise#31510 Forward-Port-Of: odoo/enterp