Steps to reproduce:

1. Create a new host "test1"
2. Link any template (e.g. "Linux by Zabbix agent" here)
3. Click "Full clone" in test1 host popup
4. Edit host name to "test2"
5. Unlink the template
6. Click "Add"

Result:
A successfull message "Host added" shows up, but host "test2" does not exist.

Expected:
"test2" is created without any template linked.
Or, if host clone fails, it should show a failure message.