added option to react to messages

lib/model/chatList/chatProps.dart

@@ -10,6 +10,8 @@ class ChatProps extends DataHolder {
   GetChatResponse? _getChatResponse;
   GetChatResponse get getChatResponse => _getChatResponse!;
 
+  int? referenceMessageId;
+
   @override
   List<ApiResponse?> properties() => [_getChatResponse];
 
@@ -30,6 +32,11 @@ class ChatProps extends DataHolder {
     );
   }
 
+  void setReferenceMessageId(int? messageId) {
+    referenceMessageId = messageId;
+    run();
+  }
+
   void setQueryToken(String token) {
     _queryToken = token;
     _getChatResponse = null;