Typewriter: history window: provide commit metadata for selective undo/redo
Typewriter: history window: provide commit metadata for selective undo/redo

git-svn-id: 3f5c6d78ff0be2386f5eccc3304aa879623f5ca8@10574 7b3f36aa-e6db-49c1-8b4c-66eac1997e64

chris-armstrong/CoreObject,etoile/CoreObject,chris-armstrong/CoreObject,chris-armstrong/CoreObject,etoile/CoreObject,etoile/CoreObject,chris-armstrong/CoreObject,etoile/CoreObject