Zabbix

A.F....... [ZBX-21739] fixed not updating discover status for templated graph prototype

* commit '3c0813006c3234ec31d7ac2d56766a20a9e217ed':
  A......... [ZBX-21739] fixed graph validation error if no graph data given
  A......... [ZBX-21739] fixed error message when trying to update templated graph
  A......... [ZBX-21739] fixed undefined index errors when updating inherited graph prototype discover status
  .......... [ZBX-21739] fixed changelog
  A......... [ZBX-21739] fixed templated graph prototype updating
  A......... [ZBX-21739] added error when trying to update a templated graph
  A.F....... [ZBX-21739] fixed inherited graph unsetting, improved update button enable code
  ..F....... [ZBX-21739] fixed coding style
  ..F....... [ZBX-21739] fixed changelog
  ..F....... [ZBX-21739] added index check
  ..F....... [ZBX-21739] fixed graph update button enable status
  A......... [ZBX-21739] fixed coding logic for templated graphs
  A......... [ZBX-21739] fixed not updating discover status for templated graph prototype

(cherry picked from commit 8b30f72e4f08c1d39c12cfd01d26e59e7755442d)