Add virtual XwtComponent.Name

Lets allow naming for all components, which
can be overriden with some useful backend
implmentation.

Xwt/Xwt/Widget.cs

@@ -590,7 +590,7 @@ public void Hide ()
 		/// <value>The widgets name.</value>
 		/// <remarks>The name can be used to identify this widget by e.g. designers.</remarks>
 		[DefaultValue (null)]
-		public string Name {
+		public override string Name {
 			get { return Backend.Name; }
 			set { Backend.Name = value; }
 		}

Xwt/Xwt/XwtComponent.cs

@@ -73,10 +73,18 @@ protected virtual BackendHost CreateBackendHost ()
 			get { return backendHost.Backend; }
 		}
 
+		/// <summary>
+		/// Gets or sets the name of this component.
+		/// </summary>
+		/// <value>The components name.</value>
+		/// <remarks>The name can be used to identify this component by e.g. designers.</remarks>
+		[DefaultValue (null)]
+		virtual public string Name { get; set; }
+
 		/// <summary>
 		/// A value, that can be used to identify this component
 		/// </summary>
-		public object Tag { get; set; }
+		virtual public object Tag { get; set; }
 
 		/// <summary>
 		/// Maps an event handler of an Xwt component to an event identifier.