refactor some controls

TimeBar, Steps, PopupWindow, Growl, Carousel

HandyControl/Interactivity/ControlCommands.cs

@@ -17,6 +17,16 @@ namespace HandyControl.Interactivity
         /// </summary>
         public static RoutedCommand Close { get; } = new RoutedCommand("Close", typeof(ControlCommands));
 
+        /// <summary>
+        ///     取消
+        /// </summary>
+        public static RoutedCommand Cancel { get; } = new RoutedCommand("Cancel", typeof(ControlCommands));
+
+        /// <summary>
+        ///     确定
+        /// </summary>
+        public static RoutedCommand Confirm { get; } = new RoutedCommand("Confirm", typeof(ControlCommands));
+
         /// <summary>
         ///     关闭所有
         /// </summary>