Zabbix

.......... [DEV-3750] added script and browser item type checks to existing item, item prototype and LLD related selenium tests

* commit 'd459696769fc36b85be3ff9723f7ae2b7691cc1d':
  .......... [DEV-3750] replaced ternary expression with regular if - else condition
  .......... [DEV-3750] moved check for execute now button state after saving the form
  .......... [DEV-3750] fixed not closing the dialog after checking execute now button state
  .......... [DEV-3750] fixed checking the Execute now button for last iteration of the aray with item types
  .......... [DEV-3750] added script and browser item type checks to existing item, itep prototype and LLD related selenium tests