Resizing the window, and moving the splitter between the HyperViewer canvas and
controls panel, now work.

 . Resizing of GLCanvas for HyperViewer.  EVT_SIZE(self.hypView, self.OnResizeCanvas)

 . Control the size of the controls panel.
		 EVT_SIZE(self.window_1, self.OnResizeWindow)
		 EVT_SPLITTER_SASH_POS_CHANGED(self.window_1, -1, self.OnSashChanged)

 . Keep dragging of the window divider outside the window from blanking the
   HyperViewer canvas or controls panel.         self.window_1.SetMinimumPaneSize(21)