documentation

Pull request #1814: feature/ZBXNEXT-9150-7.0-D-API. Added Browser item type (API).

Merge in WEB/documentation from feature/ZBXNEXT-9150-7.0-D-API to release/7.0

* commit '599a29283c004e702684a015046c55b36ab693ed':
  [ZBXNEXT-9150,ZBXNEXT-9166] fixed params for item and itemprototype object page
  fixed API name and moved entries accordingly
  [ZBXNEXT-9150, ZBXNEXT-9166] refined changes for added Browser item type
  [ZBXNEXT-9150, ZBXNEXT-9166] updated API documentation