encoding Default/Preferences

[dmitry30]

fix exit_type flag to prevent tab-restore nag

    try:
        with open(
            os.path.join(user_data_dir, "Default/Preferences"),
            encoding="latin1",
            mode="r+",
        ) as fs:
            config = json.load(fs)
            if config["profile"]["exit_type"] is not None:
                # fixing the restore-tabs-nag
                config["profile"]["exit_type"] = None
            fs.seek(0, 0)
            json.dump(config, fs)
            fs.truncate()  # the file might be shorter
            logger.debug("fixed exit_type flag")
    except Exception as e:
        logger.debug("did not find a bad exit_type flag ")

Why encoding latin1?
I have a utf-8 encoded settings file.
after overwriting it, there are problems with recoding and it increases in size.