cs snippets: small updates to Slider and Box

reference/csharp/snippets/Efl.Ui.Box.cs

@@ -1,6 +1,7 @@
 Efl.Ui.Box box = new Efl.Ui.Box(parent);
 
-//Creating content which we will pack into the box - it can be any widgets, for example buttons.
+//Creating content which we will pack into the box
+//It can be any widget, for example, buttons
 Efl.Ui.Button button1 = new Efl.Ui.Button(box);
 Efl.Ui.Button button2 = new Efl.Ui.Button(box);
 

reference/csharp/snippets/Efl.Ui.Slider.cs

@@ -3,7 +3,14 @@ Efl.Ui.Slider slider = new Efl.Ui.Slider(parent);
 slider.SetRangeLimits(0, 100);
 slider.SetRangeValue(50);
 
+// You get this event every time the slider moves
 slider.ChangedEvent += (sender, args) =>
 {
     Console.WriteLine("Current slider value is: " + slider.GetRangeValue());
 };
+
+// You only get this event once the slider is stable
+slider.SteadyEvent += (sender, args) =>
+{
+    Console.WriteLine("STEADY slider value is: " + slider.GetRangeValue());
+};