#52 AutoExpand Pending Changelist

[David Corbin]

The Pending ChangeList should be do some automatic
expansion.

1) When there is only one server/client/user node, that
node should begin expanded.
2) When the server/client/user node is expanded, the
Pending Changelist node should expand
3) When the Pending changelist node expands, the
"default" changelist should be expanded.