The goal of this commit is to: - Tweak the website filter (on website pages list added at [1]) to make it work for all website content records (page, blog, ...). - Update the 'New Page' dialog to be able to select the website_id for the new page. - Tweak the '_compute_is_homepage()' method to set 'is_homepage = True' on website's '/' page when 'homepage_url' is not set in settings. [1]: https://github.com/odoo/odoo/commit/940f4ee875332dafa1f379970a7683be6b3ee606 task-2889981 X-original-commit: d6014c60acc4231a5e56d492d2a39deaf789cbe8 Part-of: odoo/odoo#101215