Fix display of welcome screen.

- Repariert: Willkommensdialog mit der Auswahl des Modus wurde technisch nicht gut angezeigt.

zaaReloaded2/ThisAddIn.cs

@@ -26,6 +26,7 @@ using System.Windows.Input;
 using System.Windows.Controls;
 using System.Windows.Media;
 using System.Configuration;
+using System.Windows.Threading;
 
 namespace zaaReloaded2
 {
@@ -89,7 +90,12 @@ namespace zaaReloaded2
                     Updater.Version.Current.ToString()
                 );
 
-            ViewModels.FirstRunViewModel.InjectIntoIfNeeded<Views.FirstRunView>();
+            _dispatcher = Dispatcher.CurrentDispatcher;
+            System.Threading.Timer timer = new System.Threading.Timer((obj) =>
+            {
+                _dispatcher.Invoke((Action)(() => ViewModels.FirstRunViewModel.InjectIntoIfNeeded<Views.FirstRunView>()), null);
+
+            }, null, 1000, System.Threading.Timeout.Infinite);
             Logger.Info("ThisAddIn_Startup: Finished startup");
         }
 
@@ -184,6 +190,7 @@ namespace zaaReloaded2
         Ribbon _ribbon;
         string _oldCaption;
         UpdaterViewModel _updaterVM;
+        Dispatcher _dispatcher;
 
         #endregion