UI - Implemented tray icon

UI - Moved dialog service to the shared UI project
UI - Implemented autorun

src/Artemis.UI/App.xaml

@@ -2,7 +2,8 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:s="https://github.com/canton7/Stylet"
-             xmlns:local="clr-namespace:Artemis.UI">
+             xmlns:local="clr-namespace:Artemis.UI"
+             ShutdownMode="OnExplicitShutdown">
 
     <Application.Resources>
         <ResourceDictionary>