Allow for items (that have LC call numbers) to be sorted by shelving order (based upon call number and related fields)
UIIN-816 for how this field will be presented.
- Introduce a new property for the shelving order in the business logic representation of items (the definition should be read only)
- When this is provided by the storage API, map it to the
- It does not need to be mapped when provided by the client as the storage system always overwrites this property