Zabbix

A.F....... [ZBX-18549] fixed error when user was able to change the user type of own role

* commit '5d4a604d142d1d053dc7ada2c02e45d9c8345e5a':
  .......... [ZBX-18549] fixed changelog message
  .......... [ZBX-18549] added changelog
  A......... [ZBX-18549] removed unnecessary check on user type in role.create method validation
  A.F....... [ZBX-18549] fixed error message for case when user changes the user type for own role; fixed design for this message on user role edit page; fixed code style
  A.F....... [ZBX-18549] added message to user role edit form; fixed api check for role type change
  A......... [ZBX-18549] deny user to change it role type

(cherry picked from commit da07ec9edf4c49a996f52dc00faee81bfa6ed5c0)