Validated Return of a miscellaneous kit does not allow the parent item to be returned

Summary:

Validated Return of a miscellaneous kit does not allow the parent item to be returned. Only the component items are available to return. 

Cause:

This is by design, the Parent item of a Misc Kit should be a non-inventory or service item.

Solution:

• For a validated return, we MUST limit the data to what was actually sold.
• Furthermore, a validated return MUST use the components as they were sold -- even if the kit definition has changed since the sale was made.
• We explicitly support the possibility that the user needs to return/exchange only PART of a kit.