Fixed DisconnectAndSave test.

Since "ViewPosition" was made internal, when the server-side state was
loaded, the views were not positioned correctly. The real issue was that
vtkSMViewLayoutProxy should have reset the view positions after it
loaded its state. Fixed that. It's acceptable to update view positions
when loading state since the view proxies will have view sizes coming
from the state file itself.

Change-Id: Idb24beeee976746270c7a97e9585ba953aed36be
Merge topic 'refactor_python_tracing_2' into next

b47e6d08 Fixed DisconnectAndSave test.
Fix QuadView test scripts.

They were missing an "Enter" to accept entered values in the Properties
panel. Fixed that.

Change-Id: Ibd1118217a3d8b8a1f78442d3c1b3de88fdd019f
Merge topic 'refactor_python_tracing_2' into next

5f3413f8 Fix QuadView test scripts.