Show outdated comments in pull request (#13148)

Co-authored-by: zeripath <art27@cantab.net>

web_src/less/_repository.less

@@ -1220,6 +1220,16 @@
             display: block;
           }
         }
+
+        .tag {
+          color: black;
+          margin: 3px 0 0 5px;
+          padding: 2px 5px;
+          font-size: 12px;
+          border: 1px solid rgba(0, 0, 0, .1);
+          border-radius: 3px;
+          background-color: #fffbb2;
+        }
       }
     }