documentation

Pull request #3297: Feature/DEV-3773 7.5 D s63a

Merge in WEB/documentation from feature/DEV-3773-7.5-D-s63a to release/8.0

* commit '38f33783e003911d01f4729892bf2dc0b68079e7':
  DEV-3773 added info about missing item key, fixed supported platforms for an item.
  DEV-3773 formatting (sub-issue 63).