Read Review SubmittedAt.

Author: grokys

src/GitHub.App/Services/ModelService.cs

@@ -405,6 +405,7 @@ async Task<IList<IPullRequestReviewModel>> GetPullRequestReviews(string owner, s
                             Body = y.Body,
                             CommitId = y.Commit.Oid,
                             State = FromGraphQL(y.State),
+                            SubmittedAt = y.SubmittedAt,
                             User = Create(y.Author.Login, y.Author.AvatarUrl(null))
                         }).ToList()
                     });
@@ -630,6 +631,7 @@ IPullRequestModel Create(PullRequestCacheItem prCacheItem)
                         Body = x.Body,
                         State = x.State,
                         CommitId = x.CommitId,
+                        SubmittedAt = x.SubmittedAt,
                     }).ToList(),
                 ReviewComments = prCacheItem.ReviewComments.Select(x =>
                     (IPullRequestReviewCommentModel)new PullRequestReviewCommentModel
@@ -899,6 +901,7 @@ public PullRequestReviewCacheItem(IPullRequestReviewModel review)
                 };
                 Body = review.Body;
                 State = review.State;
+                SubmittedAt = review.SubmittedAt;
             }
 
             public long Id { get; set; }
@@ -907,6 +910,7 @@ public PullRequestReviewCacheItem(IPullRequestReviewModel review)
             public string Body { get; set; }
             public GitHub.Models.PullRequestReviewState State { get; set; }
             public string CommitId { get; set; }
+            public DateTimeOffset? SubmittedAt { get; set; }
         }
 
         public class PullRequestReviewCommentCacheItem