Switch back to WPF server.

Wino.Server/App.xaml

@@ -2,6 +2,7 @@
     x:Class="Wino.Server.App"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    ShutdownMode="OnExplicitShutdown"
     xmlns:local="clr-namespace:Wino.Server">
     <Application.Resources>
         <ResourceDictionary Source="TrayIconResources.xaml" />