ViewAudienceSaga

Moves a view to the owner its audience now names (the owner changes only through wow.lifecycle.TransferOwner): (shared) once it is shared, the claiming user once it is claimed. The command keeps the commit's scope and operator, and a derived command is not checked against the target's scope. A caller who waits for the move asks for Wow-Wait: handled(ViewAudienceSaga.onAudienceChanged)>snapshot.