Ensure objects held and shared by views are correct by verifying they retain
the properties applications read after archiving.
* CPAppearance: Add the name accessor.
* CPShadow:
* Add CPCoding.
* Add init with the default shadow values.
* CPObjectArchivingTest: Verifies round trips of Foundation values, AppKit
values, and objects that belong to views.
* DropInArchiveTest: State the reasons the MainMenu cibs are not included.
