- Cleanup & finish page sync / copy
- Add readonly fields which are always synced
- Remove non modified pages when parent page is unpublished
- Remove PageInheritanceItem for all inherited pages on page_unpublish signal
- Make fields actually readonly in inherited sites
- Restrict delete / copy / move actions on inherited sites (not allowed, via PagePermissions?)
- All urls should be relative (i.e. copied content should point to the visited site) (look at Page.get_url, test what works/fails)
- Use query on PageInheritance (see todo), since there will be multiple root sites.
- Test M2M attributes on page
- Add tests
- Add documentation