Some element in the backup / restore forms can be disabled because they are dependent on other values.
When a setting is disabled, we should include a hidden form element to pass the value even though the value cannot be changed. The reason is that:
We are viewing the first page of backup
Enrolled users is turned off
Role assignments is now "on but disabled"
We click next
We click previous
We turn enrolled users on
Now - role assignments is "off but disabled"
- The value does not match the form default or the previous value.