documentation

Pull request #2026: feature/DEV-3914-6.4-D. restricted mediatype.get for Admin type users.

Merge in WEB/documentation from feature/DEV-3914-6.4-D to release/6.4

* commit '395895ce846d0c4f53aeb896d1ab310b1166b320':
  [DEV-3914] updated task number
  [DEV-3914] removed one instance of "Note that..."
  [DEV-3914] restricted mediatype.get for Admin type users (with consistency improvements on multiple pages)