force relay when id is suffixed with "/r"

Signed-off-by: 21pages <pages21@163.com>

flutter/lib/desktop/pages/desktop_home_page.dart

@@ -556,6 +556,7 @@ class _DesktopHomePageState extends State<DesktopHomePage>
           isFileTransfer: call.arguments['isFileTransfer'],
           isTcpTunneling: call.arguments['isTcpTunneling'],
           isRDP: call.arguments['isRDP'],
+          forceRelay: call.arguments['forceRelay'],
         );
       }
     });