final fix to make WindowsDesktopPresenter backward compatible

Author: micampbell

WindowsDesktopPresenter/ShowAndHang/Window2DPlot.xaml.cs

@@ -72,7 +72,8 @@ public Window2DPlot(IEnumerable<IEnumerable<Vector2>> listOfArrayOfPoints, strin
             MarkerType marker, Color color = null) : this(title)
         {
             if (plot2DType == Plot2DType.Area)
-                throw new Exception("This function is not intended for Plot2DType.Area. LineColor and FillColor are required.");
+                plot2DType = Plot2DType.Line;
+                //throw new Exception("This function is not intended for Plot2DType.Area. LineColor and FillColor are required.");
             PlotData(listOfArrayOfPoints, plot2DType, closeShape, marker, color);
             InitializeComponent();
         }