This update refreshes icons and related interface styling across several enterprise modules to align with Odoo 16’s visual redesign. It also updates outdated layout classes, helping keep the user experience consistent with the wider platform changes.

PURPOSE
Mirror community changes on icons optimisation.
Introduce v16 icons in enterprise.
Part of v16 overall restyle (task-2704984).

task-2745275

Community:
- https://github.com/odoo/odoo/pull/83501

Documentation:
- https://github.com/odoo/documentation/pull/1462

The payroll dashboard was updated to use Odoo's newer tooltip mechanism after the older one was removed. This is an internal cleanup that helps keep the payroll app compatible with the platform and should not change the user experience.

The useTooltip hook has been removed (see https://github.com/odoo/odoo/pull/84160/commits)
and replaced by a service tooltip. Here we remove a call to useTooltip.