documentation

[ZBXNEXT-7835] Action configuration form became modal.

Merge in WEB/documentation from feature/ZBXNEXT-7835-6.4-D to release/6.4

* commit '4d2eec3c16093f3cc321a6e5975d4dd72cde0ba5':
  [ZBXNEXT-7835] Updated punctuation; info in multiple pages
  [ZBXNEXT-7835] Updated page: "What's new"
  [ZBXNEXT-7835] Updated pages: (multiple)
  [ZBXNEXT-7835] Updated pages: (multiple)
  [ZBXNEXT-7835] Updated pages: (multiple)
  [ZBXNEXT-7835] Updated page: "Receiving notification on unsupported items"
  [ZBXNEXT-7835] Updated page: "Receiving notification on unsupported items"
  [ZBXNEXT-7835] Updated page: "Escalations" (examples)
  [ZBXNEXT-7835] Updated page: "Escalations" (examples)
  [ZBXNEXT-7835] Updated action_operation image, "Update operations" page
  [ZBXNEXT-7835] Updated page: "Operations"
  [ZBXNEXT-7835] Updated page: "Recovery operations"
  [ZBXNEXT-7835] Updated page: "Remote commands"
  [ZBXNEXT-7835] Updated page: "Remote commands"
  [ZBXNEXT-7835] Updated page: "Operations"
  [ZBXNEXT-7835] Updated formatting: "Conditions"
  [ZBXNEXT-7835] Updated formatting: "Actions"
  [ZBXNEXT-7835] Updated page: "Actions"