internal : remove call object and call view model

Change-Id: Ie2449d1ea83e702cad1266241d9c0f254ef271aa
Tuleap: #1204
diff --git a/UserPreferences.cpp b/UserPreferences.cpp
index c9fd121..96d3afd 100644
--- a/UserPreferences.cpp
+++ b/UserPreferences.cpp
@@ -50,7 +50,7 @@
 

     String^ fileContents = Utils::toPlatformString(Utils::getStringFromFile(Utils::toString(preferencesFile)));

 

-    CoreApplication::MainView->CoreWindow->Dispatcher->RunAsync(CoreDispatcherPriority::Normal,

+    CoreApplication::MainView->CoreWindow->Dispatcher->RunAsync(CoreDispatcherPriority::High,

     ref new DispatchedHandler([=]() {

         if (fileContents != nullptr) {

             Destringify(fileContents);