Reduce the priority of dispatcher operations in integration tests

Author: sharwell

Tvl.VisualStudio.MouseFastScroll.IntegrationTests/InProcComponent.cs

@@ -31,13 +31,13 @@ private static Dispatcher CurrentApplicationDispatcher
             => Application.Current.Dispatcher;
 
         protected static void BeginInvokeOnUIThread(Action action)
-            => CurrentApplicationDispatcher.BeginInvoke(action);
+            => CurrentApplicationDispatcher.BeginInvoke(action, DispatcherPriority.Background);
 
         protected static void InvokeOnUIThread(Action action)
-            => CurrentApplicationDispatcher.Invoke(action);
+            => CurrentApplicationDispatcher.Invoke(action, DispatcherPriority.Background);
 
         protected static T InvokeOnUIThread<T>(Func<T> action)
-            => CurrentApplicationDispatcher.Invoke(action);
+            => CurrentApplicationDispatcher.Invoke(action, DispatcherPriority.Background);
 
         protected static TInterface GetGlobalService<TService, TInterface>()
             where TService : class