Tweaked remove action to return
on finding the object that is being removed and
checking if it can be navigated to. Also completed
tests for RemoveAction.
When an ascendant or parent or currently
selected object is removed the user is navigated
to the parent of the object being removed. Added variables
to RemoveAction test to test removing currently selected
domainObject.
Restrict actions which cause mutation of domain objects to
types of domain objects which can be created. (This does not
include Packet or Telemetry Point, WTD-723.)
