Zabbix

A.F.I..... [ZBXNEXT-2299] implemented problem/event filtering by performed update actions and user; reworked problem filter to support filtering by acknowledgement status and current user

Merge in ZBX/zabbix from feature/ZBXNEXT-2299-6.5 to master

* commit 'e5dc5ca9ef15a43b7c00f4732fd9bc4198630431':
  .......... [ZBXNEXT-2299] fixed testPageProblems autotest
  ..F....... [ZBXNEXT-2299] fixed widget edit form view generation
  ..F....... [ZBXNEXT-2299] fixed widget edit form view generation
  ..F....... [ZBXNEXT-2299] fixed translation strings
  .......... [ZBXNEXT-2299] fixed selenium autotests
  ..F....... [ZBXNEXT-2299] fixed acknowledgement status field becoming non-operational after switching between tabs
  ..F....... [ZBXNEXT-2299] fixed translation string
  ........S. [ZBXNEXT-2299] fixed minor coding style in db patch
  ..F....... [ZBX-2299] fixed selenium tests
  ....I..... [ZBXNEXT-2299] minor code refactoring
  .D........ [ZBXNEXT-2299] fixed changelog
  A.F....... [ZBXNEXT-2299] fixed multiple minor issues
  ..F.I..... [ZBXNEXT-2299] renamed field and implemented constants
  A......... [ZBXNEXT-2299] fixed filter action_userid validation in event/problem get methods
  A.F....... [ZBXNEXT-2299] fixed coding style
  A......... [ZBXNEXT-2299] fixed query building problem when postgres required boolean expression for bitwise check
  ..F....... [ZBXNEXT-2299] fixed unneeded code
  ..F....... [ZBXNEXT-2299] fixed widget field overlay
  ..F....... [ZBXNEXT-2299] removed unnecessary code
  A.F....... [ZBXNEXT-2299] implemented problem/event filtering by performed update actions and user; reworked problem filter to support filtering by acknowledgement status and current user