Add timestamp & edited to chatroom and also do the same stuff from 2nd last commit in here in edit popup

Assets/Scripts/Types/ChatroomMessage.cs

@@ -40,4 +40,12 @@ public class ChatroomMessage
     [Preserve]
     [JsonProperty("customIcon")]
     public string CustomIcon { get; set; }
+
+    [Preserve]
+    [JsonProperty("timestamp")]
+    public long Timestamp { get; set; }
+
+    [Preserve]
+    [JsonProperty("editedAt")]
+    public long EditedAt { get; set; }
 }