This update simplifies styling for enterprise form views as part of a broader visual cleanup. It improves consistency in editable note fields and helps keep the interface easier to maintain, with minimal direct impact on day-to-day users.

Part of the overall v16 SCSS optimization/restyle, task-2704984

Requires: 
- https://github.com/odoo/odoo/pull/98101

task-2918464

The PLM notification button has been modernized without changing its intended business function. This helps keep the manufacturing product lifecycle interface maintainable and aligned with the current platform framework.

Updates the plm_toaster_button widget into OWL.

Task-2885757