Add Watermark feature to MahApps.Metro.Styles.ButtonRichTextBox
Add Watermark feature to MahApps.Metro.Styles.ButtonRichTextBox

ye4241/MahApps.Metro,xxMUROxx/MahApps.Metro,Evangelink/MahApps.Metro,MahApps/MahApps.Metro,batzen/MahApps.Metro