add CircleProgressBar

thanks to @ghost1372 suggestion

HandyControlDemo/Data/MessageToken.cs

@@ -36,6 +36,8 @@
 	
         public static readonly string PreviewSliderDemoCtl = nameof(PreviewSliderDemoCtl);
 	
+        public static readonly string CircleProgressBarDemoCtl = nameof(CircleProgressBarDemoCtl);
+	
         public static readonly string ButtonDemoCtl = nameof(ButtonDemoCtl);
 
         public static readonly string ToggleButtonDemoCtl = nameof(ToggleButtonDemoCtl);

HandyControlDemo/Data/MessageToken.tt

@@ -20,7 +20,8 @@ var controlList = new List<string>
 	"NumericUpDownDemoCtl",
 	"WindowDemoCtl",
 	"ScrollViewerDemoCtl",
-	"PreviewSliderDemoCtl"
+	"PreviewSliderDemoCtl",
+	"CircleProgressBarDemoCtl"
 };
 var styleList = new List<string>
 {