Campaign quick creation now shows user avatars when assigning a responsible user. This makes it easier for teams to visually identify the right person and reduces selection mistakes.

Adds the user avatar widget to the quick create user field.

Task-3113972

This update modernizes how spreadsheet documents connect to live update services by removing an older session dependency. It is an internal improvement that should help maintain reliability without changing the user experience.

community: https://github.com/odoo/odoo/pull/110247