Zabbix

..F....... [ZBXNEXT-8486] made item and item prototype modal

Merge in ZBX/zabbix from feature/ZBXNEXT-8486-6.5 to master

* commit 'f639483790907d6f88d39ac57bba0fd7a76b4dbf':
  .......... [ZBXNEXT-8486] fixed Selenium tests - removed redundant constants from testFormPreprocessingItem/Prototype
  .......... [ZBXNEXT-8486] fixed Selenium tests - applied changes requested in the review
  .......... [ZBXNEXT-8486] fixed Selenium tests - added additional checks to testFormItem, testFormItemPrototype
  .......... [ZBXNEXT-8486] typo fix for Selenium test - changed  to  for screenshots in HTTP agent check
  ..F....... [ZBXNEXT-8486] added missing fix from ZBX-23302
  ..F....... [ZBXNEXT-8486] added missing button state update after xhr request
  .......... [ZBXNEXT-8486] fixed Selenium tests - added major part of changes requested in the review
  .......... [ZBXNEXT-8486] fixed failed Selenium tests - minor adjustments for tags check, mass update, preprocessing
  ..F....... [ZBXNEXT-8486] removed test button deactivation when key is empty
  ..F....... [ZBXNEXT-8486] fixed valuemap comparing valuemap hostid and current host hostid
  ..F....... [ZBXNEXT-8486] fixed templated valuemap were shown after clone
  ..F....... [ZBXNEXT-8486] fixed incorrect delete confirmation message