Permit firmware to send responses until stdout handle is drained

src/AnalyzeView/MavlinkConsoleController.cc

@@ -87,7 +87,7 @@ MavlinkConsoleController::_sendSerialData(QByteArray data, bool close)
     // Send maximum sized chunks until the complete buffer is transmitted
     while(data.size()) {
         QByteArray chunk{data.left(MAVLINK_MSG_SERIAL_CONTROL_FIELD_DATA_LEN)};
-        uint8_t flags = SERIAL_CONTROL_FLAG_EXCLUSIVE |  SERIAL_CONTROL_FLAG_RESPOND;
+        uint8_t flags = SERIAL_CONTROL_FLAG_EXCLUSIVE |  SERIAL_CONTROL_FLAG_RESPOND | SERIAL_CONTROL_FLAG_MULTI;
         if (close) flags = 0;
         auto protocol = qgcApp()->toolbox()->mavlinkProtocol();
         auto priority_link = _vehicle->priorityLink();