This update refreshes internal automated tests for Facebook-related social features without changing the visible product experience. It helps the team keep the module easier to maintain and reduces the risk of future regressions in comment and preview behavior.

Part of task-4028356

The Sign document request dropdown has been rebuilt using Odoo's own interface component instead of relying on Bootstrap. This supports Odoo's broader effort to reduce external UI dependencies while keeping the signing workflow consistent for users.

As we try to remove as much as possible our dependency on Bootstrap components for the backend, this commit rewrites the Sign's document request dropdown by using our own implementation instead of the Bootstrap's one.

task-4277543

This internal cleanup makes Odoo's IoT components use a shared system identifier instead of checking the operating system in multiple places. It helps keep hardware integrations more consistent and easier to maintain, with no expected change for day-to-day users.

Related odoo PR/ https://github.com/odoo/odoo/pull/216055