Zabbix

..F....... [ZBX-22210] fixed selected count when using filter and filtered parameter is changed in popup

* commit 'dc6daf8fb50dc16b38ba3a2cb83701647d37c71f':
  ..F....... [ZBX-22210] added checkbox_hash variable to improve code readability
  ..F....... [ZBX-22210] fixed selected checkboxes count in item, trigger and discovery list
  ..F....... [ZBX-22210] fixed selected count in item, trigger and discovery list pages when deleting an element
  ..F....... [ZBX-22210] fixed selected count in item, trigger, discovery and maintenance list pages
  ..F....... [ZBX-22210] fixed selected count in Monitoring->Problems page
  ..F....... [ZBX-22210] fixed selected count when using filter and filtered parameter is changed  in popup

(cherry picked from commit 03bb81b3f15cdd2e2f97085ee7aff19b1e6f676a)