documentation

Pull request #1440: Feature/ZBXNEXT-8750 7.0 D

Merge in WEB/documentation from feature/ZBXNEXT-8750-7.0-D to release/7.0

* commit '8c3490217a91804748af3cb955a955cc100b6582':
  ZBXNEXT-8750-7.0 screenshot size changed
  ZBXNEXT-8750-7.0 field names reworded