add icon to XamlOutlineNode

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlOutlineNode.cs

@@ -6,6 +6,7 @@ using System.Linq;
 using System.Windows;
 
 using ICSharpCode.NRefactory.Editor;
+using ICSharpCode.SharpDevelop;
 using ICSharpCode.SharpDevelop.Editor;
 using ICSharpCode.TreeView;
 
@@ -108,5 +109,9 @@ namespace ICSharpCode.XamlBinding
 		public override object Text {
 			get { return (!string.IsNullOrEmpty(Name) ? ElementName + " (" + Name + ")" : ElementName); }
 		}
+		
+		public override object Icon {
+			get { return SD.ResourceService.GetImageSource("Icons.16x16.HtmlElements.Element"); }
+		}
 	}
 }