Separate "Landing Pages" record

[Ardnived]

Yogis often want to create landing pages for events, and we want to support that behaviour.

• Now that we've moved to subdomains (ie. /it, /ru) custom pages in other languages no longer live on the landing page. It would be preferable to have your landing page at wemeditate.com/event, rather than wemeditate.com/ru/event
• Only regional admins can edit static pages, but often the yogis who create a landing page are one-off users. We need to be able to give them direct access to writing a landing page only. Like we can do with article writers.

[Ardnived]

This is now done, pending some testing from users and a cleanup of the database in a week or so time.