Allow auto connect after upgrade

src/VehicleSetup/FirmwareUpgradeController.cc

@@ -509,6 +509,7 @@ void FirmwareUpgradeController::_flashComplete(void)
     _appendStatusLog("Upgrade complete", true);
     _appendStatusLog("------------------------------------------", false);
     emit flashComplete();
+    qgcApp()->toolbox()->linkManager()->setConnectionsAllowed();
 }
 
 void FirmwareUpgradeController::_error(const QString& errorString)