S2: add viewer_is_maintainer()
Short, concise description of the idea
I'd like to have some elements of the sidebar only visible to my co-maintainers in order to create an admin tools box.
Full description of the idea
viewer_is_owner() lets you have private elements in one's paid journal but it doesn't work in communities. Either make it work for these too or create viewer_is_maintainer() for communities.
- Let community maintainers have a hidden handy link list to easily admin their paid communities.