Update PR details when review submitted.

Author: grokys

src/GitHub.App/ViewModels/GitHubPane/PullRequestDetailViewModel.cs

@@ -53,6 +53,7 @@ public sealed class PullRequestDetailViewModel : PanePageViewModelBase, IPullReq
         bool active;
         bool refreshOnActivate;
         Uri webUrl;
+        IDisposable sessionSubscription;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="PullRequestDetailViewModel"/> class.
@@ -441,6 +442,11 @@ public async Task Load(IPullRequestModel pullRequest)
                     UpdateState = null;
                 }
 
+                sessionSubscription?.Dispose();
+                sessionSubscription = Session.WhenAnyValue(x => x.HasPendingReview)
+                    .Skip(1)
+                    .Subscribe(x => Reviews = PullRequestReviewSummaryViewModel.BuildByUser(Session.User, Session.PullRequest).ToList());
+
                 if (firstLoad)
                 {
                     usageTracker.IncrementCounter(x => x.NumberOfPullRequestsOpened).Forget();