The Studio sidebar checkbox for enabling mass editing now uses the correct layout wrapper. This fixes its styling and alignment so the option appears consistently with the rest of the Studio interface.

The "Enable Mass Editing" check box wasn't wrapped with
`o_web_studio_sidebar_checkbox` so the style and the alignment of the
checkbox was wrong.

This fixes automated checks around the year picker in Documents Spreadsheet. It helps keep releases reliable by ensuring the filter panel is tested correctly, with no expected change to everyday user workflows.

Runbot-id 4096
Runbot-id 4104

This fixes an issue in Point of Sale where an order linked to a fiscal position could become impossible to delete. It helps cashiers and store managers correct mistakes more reliably during POS operations.

Part of https://github.com/odoo/odoo/pull/96090.

Internal spreadsheet tests were updated to match recent changes in how user context is handled. This helps keep automated checks reliable and reduces the risk of future spreadsheet regressions reaching users.

This fixes some tests due to changes in context handling.
Related to odoo/odoo#96161

Resizing a Knowledge article while the chatter panel is open no longer triggers an error popup. This improves stability for users editing or reviewing articles in smaller or changing browser windows.

Fix the bug where an error message would pop up when resizing the window in the
article form view with the chatter open.

`this._chatterContainerTarget` was not set up in the knowledge form renderer and
is required by the mail form renderer. This commit properly set up the target
when the chatter is rendered.

Task-2917593