Zabbix

.......... [DEV-4434] added cases for checking period dialog in testFromMaintenance selenium autotest

* commit '1a64383edceb9bd00653d2b4ae912e17efb2fca8':
  .......... [DEV-4434] removed element with timestamp from one-time period screenshot check
  .......... [DEV-4434] small changes for estFormMaintenance autotests
  .......... [DEV-4434] small changes for testFromMaintenance
  .......... [DEV-4434] some changes for testFromMaintenance
  .......... [DEV-4434] some changes for testFromMaintenance
  .......... [DEV-4434] small fixes for testFromMaintenance
  .......... [DEV-4434] some fixes for testFromMaintenance
  .......... [DEV-4434] small fixes for  testFromMaintenance
  .......... [DEV-4434] screenshots added for periods in testFromMaintenance
  .......... [DEV-4434] screenshots added for periods in testFromMaintenance