Network shapes load, save, and print properly

EduNetworkBuilder/Network.cs

@@ -799,6 +799,8 @@ namespace EduNetworkBuilder
                 SolidBrush theBrush = new SolidBrush(SystemColors.Control);
                 Graphics.FromImage(TheNetImage).FillRectangle(theBrush, new Rectangle(0,0, TheNetImage.Width, TheNetImage.Height));
                 //re-generate the image
+                foreach (NetShape shape in Shapes)
+                    shape.Draw(TheNetImage); //Draw any shapes
                 //Do all the links first
                 foreach (NetworkComponent NC in NetComponents)
                 {