DSC-460 'Holdings', 'Internal Access Condition' and 'Availability to Pub...

It fixes following issues:
DSC-460
- on new/edit Work, holdings field is available for editing, even without a bibID
- on new Work screen, default value for 'Internal Access Condition' field is set to 'Open'.
- if 'Internal Access Condition' field is set to 'Closed', 'Availability to Public' field cannot be 'Unrestricted'
- on edit Work screen, 'Internal Access Condition' and 'Availability to Public' fields are not changed to default values.