Stop showing notification message.

Notification message fades away automatically after some time. This function will remove it immediately.

Show a notification in an editor window.

	// Simple example that shows a notification message
	// with what the user has typed.
	
	class ShowRemoveNotification extends EditorWindow {
	
		var notification : String = "This is a Notification";
	
		@MenuItem("Example/Notification usage")
		static function Initialize() {
			var window : ShowRemoveNotification = EditorWindow.GetWindow(ShowRemoveNotification);
			window.Show();
		}
		
		function OnGUI() {
			notification = EditorGUILayout.TextField(notification);
			if(GUILayout.Button("Show Notification")){
				this.ShowNotification(GUIContent(notification));
			}
			if(GUILayout.Button("Remove Notification")) {
				this.RemoveNotification();
			}
		}
	}