message: Disable Qt 5.15 deprecation warnings in networkmanagement (linux)
diff: #define NETWORKMANAGEMENT_H
  #include <QObject>
  +
  +#ifdef QT_DEPRECATED_VERSION_5_15
  +#undef QT_DEPRECATED_VERSION_5_15
  +#endif
  +#define QT_DEPRECATED_VERSION_5_15
  +
  #include <QNetworkConfigurationManager>
  class NetworkManagement : public QObject
  