This patch synchronizes background color of Preview and Overview modules.
But still, the thumbnail color in Preview's background color button remain unchanged. For that I think a PropertyChangeListener needs to be added to preview model like in vizModel.addPropertyChangeListener().
This patch synchronizes background color of Preview and Overview modules. istener needs to be added to preview model like in vizModel. addPropertyChan geListener( ).
But still, the thumbnail color in Preview's background color button remain unchanged. For that I think a PropertyChangeL