Zabbix

..F....... [ZBX-24146] fixed update of item timeout value upon other form field changes

Merge in ZBX/zabbix from feature/ZBX-24146-6.5 to master

* commit '831c61700c1c873020f317392cbf6ecb49609501':
  ..F....... [ZBX-24146] minor code refactoring
  ..F....... [ZBX-24146] fixed item timeout value update when creating new item
  ..F....... [ZBX-24146] fixed code style, updated changelog
  ..F....... [ZBX-24146] fixed item timeout parametvalue when editing or cloning an existing item
  ..F....... [ZBX-24146] fixed update of item timeout value upon form field changes

(cherry picked from commit 077d7b8138bd58008228dd72a0cf18df5d070002)