Prior to this commit, the language of the snippet menu would be the same as the snippet content. This would cause issues if the user's language was not the same as the website they were editing. This commit fixes that by displaying the snippet menu in the user's selected language but getting snippet content in the website's language. This commit also fixes SEO data not being saved according to the website's displayed language. Prior, it was saved according to the user's current display language. This commit also introduces a test for a fix made at [1] that targets a previous version of odoo. [1]: https://github.com/odoo/odoo/commit/db5d1eae2086ff338d8211af70c2f88240393c36 task-2687506 closes odoo/odoo#102799 X-original-commit: 55a978aa86967581956f855a1c5db33b7425bd15 Signed-off-by: Romain Derie (rde) <rde@odoo.com>