implemented UseFloatingWatermark

samples/TestApplication/Program.cs

@@ -344,7 +344,6 @@ namespace TestApplication
 							new TextBox { Text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.", Width = 200},
                             new TextBox { Width = 200, Watermark="Watermark"},
                             new TextBox { Width = 200, Watermark="Floating Watermark", UseFloatingWatermark = true },
-                            new TextBox { Width = 200, Text="Lorem ipsum", ClearTextButton=true, Watermark="Watermark"},
                             new TextBox { AcceptsReturn = true, TextWrapping = TextWrapping.Wrap, Width = 200, Height = 150, Text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est." },
 							new TextBlock
 							{