1. By default, field are not disabled
2. Fields are disabled, determined by the field-configuration
3. If no (null) configuration is provided (a new field), the field is not disabled. 
4. Fields are disabled if the form (card) is disabled)
5. Disabled fields are visually easy to spot

Future Functionality (not necessary in 2sxc 10.0)

1. A disabled group makes all the fields in it disabled
2. A field can also become disabled based on rules, which can come from url-params or from values in other fields
3. System users in debug mode may be able to edit this anyhow