Commit [1] copied a lot of website snippet options into mass mailing. Some were moved to web_editor and xpathed to be used in both without duplicating code. Sadly that is not without side effects and it was therefore decided to duplicate them instead so they can live separate lives in the future. [1] https://github.com/odoo/odoo/commit/4f7cd33d0fd69ee5984d0968233ffc73d7751030 Part-of: odoo/odoo#77724