Steps to reproduce:

1. Create template with host prototype
2. Add macros to host prototype
3. Create host
4. Link template to the host
5. On host open inherited host prototype from template
6. Select Macros tab

Result:
Macros looks enabled.
Add button not working and changes not saved

 Expected:
Macros should be disabled.
If there are no macros, it used to be message "No macros found."