Inject server_version into saved config

        """

        Merges the current settings back to disk

        """

        # Read curent config

        current_config = self.read_config()

        # Merge in server version responsible for saving the config file

        current_config['server_version'] = pkg_resources.get_distribution('openflexure_microscope').version

        # Save config to file

        self.settings_file.save(self.read_config(), backup=True)

    @property