Add alert template and redirect to diff page on review failure

Author: adelowo

routers/repo/pull_review.go

@@ -123,7 +123,7 @@ func SubmitReview(ctx *context.Context, form auth.SubmitReviewForm) {
 			}
 
 			ctx.Flash.Error(translated)
-			ctx.Redirect(fmt.Sprintf("%s/pulls/%d", ctx.Repo.RepoLink, issue.Index))
+			ctx.Redirect(fmt.Sprintf("%s/pulls/%d/files", ctx.Repo.RepoLink, issue.Index))
 			return
 		}
 	}

templates/repo/pulls/files.tmpl

@@ -11,6 +11,7 @@
 		<div class="ui divider"></div>
 		{{template "repo/issue/view_title" .}}
 		{{template "repo/pulls/tab_menu" .}}
+		{{template "base/alert" .}}
 		<div class="ui bottom attached tab pull segment active">
 			{{template "repo/diff/box" .}}
 		</div>