documentation

Pull request #1070: feature/ZBXNEXT-8245-7.0-D-DEVC: [ZBXNEXT-8245] (DEVEL) Advanced configuration checkboxes converted to collapsible blocks; additional formatting improvements.

Merge in WEB/documentation from feature/ZBXNEXT-8245-7.0-D-DEVC to release/7.0

* commit '80dc61a7f54fdadcc16d9f4b5119b95f81278840':
  [ZBXNEXT-8245] Fixed formatting in code example
  [ZBXNEXT-8245] Fixed formatting in code example
  [ZBXNEXT-8245] Updated ZIP archives with sample modules
  [ZBXNEXT-8245] Fixed formatting in code example
  [ZBXNEXT-8245] Updated ZIP archives with sample modules
  [ZBXNEXT-8245] Fixed code examples
  [ZBXNEXT-8245] Fixed JS file name
  [ZBXNEXT-8245] Fixed formatting in code examples
  [ZBXNEXT-8245] Fixed formatting in code examples
  [ZBXNEXT-8245] Added missing semicolon
  [ZBXNEXT-8245] Updated code blocks
  [ZBXNEXT-8245] Updated class.widget.js code block
  [ZBXNEXT-8245] (DEVEL) Advanced configuration checkboxes converted to expandable/collapsible blocks; additional formatting improvements