documentation

Pull request #1049: feature/ZBXNEXT-8245-7.0-D: [ZBXNEXT-8245] Advanced configuration checkboxes converted to collapsible blocks.

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

* commit 'db6782980c13db88910a4de2d762523d0f973854':
  [ZBXNEXT-8245] Reworded "expandable/collapsible" to "collapsible"
  [ZBXNEXT-8245] Added missing period, reworded "this field" > "this section"
  [ZBXNEXT-8245] Advanced configuration checkboxes converted to expandable/collapsible blocks (fixes and enhancements)
  [ZBXNEXT-8245] Advanced configuration checkboxes converted to expandable/collapsible blocks