- Scale*LookupTable sets whether to scale the lookup table range to
   the data range.

 - *TextProperty sets the point/cell (or vertex/edge) text property
   for labels. This replaces the functionality of Set*LabelColor.

 - Updated ClientTreeAreaView and ClientGraphView to use these new
   theme parameters, in addition to lookup tables that were added
   previously. No changes were made to the display panel to incorporate
   this, just XML and the view itself.

 - Changing the shape of the color swatches on vtkQt*View from
   square to circle.

 - Fixing label placement in ClientGraphView so labels appear just over
   the vertex (or icon if icons are used).

 - Remove "Selecting" flag in vtkQtTreeView since it seems to hinder
   updating the selection color when selecting in that view.