Fix a bug in the view tree implementation. Trees in separate windows were not using separate cookies to persist state.
Fix a bug in the view tree implementation. Trees in separate windows were not using separate cookies to persist state.

luckypoem/ganglia-web,torkelsson/ganglia-web,torkelsson/ganglia-web,ganglia/ganglia-web,torkelsson/ganglia-web,luckypoem/ganglia-web,luckypoem/ganglia-web,ganglia/ganglia-web,luckypoem/ganglia-web,ganglia/ganglia-web,luckypoem/ganglia-web,ganglia/ganglia-web,torkelsson/ganglia-web,torkelsson/ganglia-web,ganglia/ganglia-web