Added WPF Scheduler tooltip customization sample

Author: GokulSF4339

WPFSchedulerDemo/WPFSchedulerDemo/MainWindow.xaml.cs

@@ -11,8 +11,6 @@ public partial class MainWindow : Window
         public MainWindow()
         {
             InitializeComponent();
-
-            //Applying meterial3 light theme initially. 
             SfSkinManager.SetTheme(this, new Theme("Material3Light"));
         }
     }