Override the default font for Demo Mode

Check for null MyFlexGrid before using it.
Added Static LineWidth0 method used for drawing borders on the screen
Fixed logic to draw borders on the VlnFlexGrid
Fixed logic to draw grid borders on the pdf output.

PROMS/VEPROMS User Interface/frmVEPROMS.cs

@@ -274,6 +274,13 @@ namespace VEPROMS
 			tc.Enter += new EventHandler(tc_Enter);
 			tc.Leave += new EventHandler(tc_Leave);
 			this.Deactivate += new EventHandler(frmVEPROMS_Deactivate);
+			if (VlnSettings.DemoMode) StepRTB.MyFontFamily = GetFamily("Bookman Old Style");
+		}
+		private FontFamily GetFamily(string name)
+		{
+			foreach (FontFamily ff in FontFamily.Families)
+				if (ff.Name == name) return ff;
+			return null;
 		}
 		void frmVEPROMS_Deactivate(object sender, EventArgs e)
 		{