reproduce issue https://github.com/refinery/refinerycms/issues/1733

I am facing the same issue reported by @agush22 a year ago: I switch to another frontend locale and can't edit any pages. In his case, he was editing the seeded pages, but here I demonstrate the issue for any page created by the user when the locale is not english. Can you please review this small functional test and check if the issue is really solved?