documentation

Pull request #1312: Feature/ZBXNEXT-8444 7.0 D

Merge in WEB/documentation from feature/ZBXNEXT-8444-7.0-D to release/7.0

* commit 'bb805cdf1a53291bc8077eb2cec26b2647eb5f4b':
  ZBXNEXT-8444 screenshot changed
  ZBXNEXT-8444-7.0 link fixed
  ZBXNEXT-8444-7.0 screenshot changed
  ZBXNEXT-8444-7.0 screenshot changed
  ZBXNEXT-8444-7.0 screenshot changed
  ZBXNEXT-8444-7.0 formatting fix
  ZBXNEXT-8444-7.0 new modal window