Zabbix

A.F....... [ZBXNEXT-8690] implemented a new filter in media type list view to filter out media types by their usage in actions

Merge in ZBX/zabbix from feature/ZBXNEXT-8690-7.1 to master

* commit 'e4c13031c3d1c4022889bacad2e8f4c930a8e62b':
  .......... [ZBXNEXT-8690] added test cases to check the new filtering option in mediatype list page
  ..F....... [ZBXNEXT-8690] renamed label "Media types used in actions" -> "Display actions"
  A......... [ZBXNEXT-8690] fixed coding style
  ..F....... [ZBXNEXT-8690] reverted part of the code and moved action processing to separate function
  A......... [ZBXNEXT-8690] changed translation string
  ..F....... [ZBXNEXT-8690] removed excessive usage of foreach loops
  ..F....... [ZBXNEXT-8690] changed hint-box description
  ..F....... [ZBXNEXT-8690] fixed old issue with showing actions for media types that had only "Notify all involved" with no other operations
  ..F....... [ZBXNEXT-8690] fixed actions being incorrectly displayed in case "notify all involved" was added
  ..F....... [ZBXNEXT-8690] implemented action filtering instead of media type filtering
  A......... [ZBXNEXT-8690] added media type name in the error message when deleting a media type that is used in action
  ..F....... [ZBXNEXT-8690] added new filter in media type list view