The HTML builder gains a new overlay panel that brings visual styling controls closer to the content being edited. This should make common design adjustments such as backgrounds, shadows, and image shapes more discoverible and faster for users building pages.

WIP

Point of Sale users can now switch the IoT Box connection mode directly from the local, online, or offline status button. This makes it easier to recover or choose the best connection method when devices need to communicate through either local polling or websocket mode.

We used to allow longpolling again manually if the IoT Box was reachable (by pinging it), but we couldn't force the connection to use websocket if needed.

We now switch between modes when clicking the local/online/offline button in PoS.

Task: 5055024