Fix nuxeo-directory-radio-group missing multivalued complex sub-property value selected at doc creation

Steps to reproduce:

1. In Studio, create a project with a custom doctype that has a multi-valued Complex property with a Directory-type subproperty. Configure its layouts to use nuxeo-directory-radio-group instead of the default nuxeo-directory-suggestion. (attaching sample project .zip - doctype name is MultiComplex)
2. In Web UI, create a new instance of this doctype. Create a new entry for the multivalued complex property (see screenshot 1).
3. Following this, Edit the document. Find the multivalued complex entry set earlier and click its Edit button.
4. Observe result (see screenshot 2)

Expected result: radio group widgets of multi-valued complex subproperties in Edit layouts are populated with the value set for the field at document creation (in attached example, should show "Type 1" selected).

Actual result: radio group widgets of multi-valued complex subproperties in Edit layouts are missing the value set for the field at document creation.