Use alternative to JoinableTaskFactory.WithPriority

This following doesn't return until the GitHub pane has completed loading.
await JoinableTaskFactory
    .WithPriority(VsTaskRunContext.UIThreadNormalPriority)
    .SwitchToMainThreadAsync();

Author: jcansdale

src/GitHub.Exports/Helpers/ThreadingHelper.cs

@@ -8,6 +8,9 @@
 using static Microsoft.VisualStudio.Threading.JoinableTaskFactory;
 using static Microsoft.VisualStudio.Threading.AwaitExtensions;
 using System.Windows.Threading;
+using Microsoft.VisualStudio.Shell.Interop;
+using Microsoft.VisualStudio.Shell;
+using Task = System.Threading.Tasks.Task;
 
 namespace GitHub.Helpers
 {
@@ -56,6 +59,17 @@ public static IAwaitable SwitchToPoolThreadAsync(TaskScheduler scheduler = null)
                 new AwaitableWrapper(scheduler ?? TaskScheduler.Default);
         }
 
+        // HACK: This is a workaround because the following doesn't seem to work.
+        //await JoinableTaskFactory
+        //   .WithPriority(VsTaskRunContext.UIThreadNormalPriority)
+        //   .SwitchToMainThreadAsync();
+        public static Task RunOnMainThreadNormalPriority(Action action)
+        {
+            var service = (IVsTaskSchedulerService2)VsTaskLibraryHelper.ServiceInstance;
+            var scheduler = service.GetTaskScheduler((uint)VsTaskRunContext.UIThreadNormalPriority);
+            return Task.Factory.StartNew(action, default(CancellationToken), TaskCreationOptions.HideScheduler, scheduler);
+        }
+
         class AwaitableWrapper : IAwaitable
         {
             Func<IAwaiter> getAwaiter;

src/GitHub.InlineReviews/PullRequestStatusBarPackage.cs

@@ -8,6 +8,7 @@
 using Microsoft.VisualStudio.Shell;
 using Serilog;
 using Task = System.Threading.Tasks.Task;
+using GitHub.Helpers;
 
 namespace GitHub.InlineReviews
 {
@@ -27,13 +28,15 @@ protected override async Task InitializeAsync(CancellationToken cancellationToke
             var serviceProvider = (IGitHubServiceProvider)await GetServiceAsync(typeof(IGitHubServiceProvider));
             var barManager = new PullRequestStatusBarManager(usageTracker, serviceProvider);
 
-            log.Information("SwitchToMainThreadAsync");
-            await JoinableTaskFactory
-               .WithPriority(VsTaskRunContext.UIThreadNormalPriority)
-               .SwitchToMainThreadAsync();
+            // Unfortunately this doesn't return until after the GitHub pane has finnished refreshing.
+            //log.Information("SwitchToMainThreadAsync");
+            //await JoinableTaskFactory
+            //   .WithPriority(VsTaskRunContext.UIThreadNormalPriority)
+            //   .SwitchToMainThreadAsync();
 
-            log.Information("StartShowingStatus");
-            barManager.StartShowingStatus();
+            // Posting a task like this seems to work.            
+            await ThreadingHelper.RunOnMainThreadNormalPriority(() => barManager.StartShowingStatus());
         }
+
     }
 }