Zabbix

A.F.I..PS. [ZBXNEXT-8496] implemented aggregation function for Item value widget and time period functionality for Top hosts widget

Merge in ZBX/zabbix from feature/ZBXNEXT-8496-6.5 to master

* commit '2a86e21ddc3331fe879668daa1f1941f3da39973': (146 commits)
  .......... [ZBXNEXT-8496] added new hint text for testDashboardTopHostsWidget_Layout test
  ..F....... [ZBXNEXT-8496] fixed item selection based on aggregation function in Top hosts widget.
  ..F....... [ZBXNEXT-8496] fixed not displaying aggregated data in Top hosts widget
  ..F....... [ZBXNEXT-8496] fixed value formatting according to aggregation function in widgets
  ..F....... [ZBXNEXT-8496] fixed incorrectly formed function parameter in Item value widget
  A......... [ZBXNEXT-8496] fixed aggregation result formatting (removed trailing zeros) for AVG function
  ..F....... [ZBXNEXT-8496] refactored removal of threshold color calculation for non-numeric items
  ..F....... [ZBXNEXT-8496] removed threshold color calculation for non-numeric items
  ..F....... [ZBXNEXT-8496] added modified files after update to latest master #2
  ..F....... [ZBXNEXT-8496] added modified files after update to latest master
  ..F....... [ZBXNEXT-8496] added value mapping capability to the AVG aggregation function
  ..F....... [ZBXNEXT-8496] fixed expression macro calculation by using data from history tables only
  .......... [ZBXNEXT-8496] added unit tests according to changes in the CRelativeTimeParser parser
  .......... [ZBXNEXT-8496] fixed code style
  .......... [ZBXNEXT-8496] added fixes regarding code review
  ..F....... [ZBXNEXT-8496] refactored data source calculation in Pie Chart widget
  ..F....... [ZBXNEXT-8496] fixed displaying of units after data aggregation in widgets
  ..F....... [ZBXNEXT-8496] fixed value aggregation in Pie Chart widget
  .......... [ZBXNEXT-8496] fixed testDashboardTopHostsWidget_CheckTextItems test
  ..F....... [ZBXNEXT-8496] fixed coding style
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