documentation

Pull request #1509: feature/ZBXNEXT-5120-7.0-D2. Updated "Macro functions" page structure.

Merge in WEB/documentation from feature/ZBXNEXT-5120-7.0-D2 to release/7.0

* commit 'db91196be5321f11308d13ab754bb8d18b71f423':
  [ZBXNEXT-5120] Refined formatting
  [ZBXNEXT-5120] Refined formatting
  [ZBXNEXT-5120] Refined formatting
  [ZBXNEXT-5120] Refined formatting
  [ZBXNEXT-5120] Updated "Macro functions" page structure