initialize as a bridge device

platform/qt/dmxwidget/dmxwidget.cpp

@@ -62,7 +62,10 @@ void DmxWidget::open()
   getSerialNumber();                        // request a serial number
   getParameters(0);                         // get the metadata while we're here
   if (wait_for(reply_serial))               // widget is found if a serial number reply is received
+  {
+    setModeBridge();                        // widget defaults to bridge, so sync our state
     emit connectedChanged(isConnected());
+  }
   else
     close();
 }