add slider style

HandyControlDemo/UserControl/Main/NoUserContent.xaml

@@ -2,7 +2,6 @@
       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
       xmlns:interactivity="clr-namespace:HandyControl.Interactivity;assembly=HandyControl"
-      DataContext="{Binding NoUserContent,Source={StaticResource Locator}}"
       xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
       Height="28"
       xmlns:controls="clr-namespace:HandyControl.Controls;assembly=HandyControl"