Simplify PathBuf setting

[lonesometraveler]

No description provided.

[hacknus]

we should only call

match self.save_tx.send(self.picked_path.clone()) {
    Ok(_) => {}
    Err(err) => {
        print_to_console(
            &self.print_lock,
            Print::Error(format!(
                "save_tx thread send failed: {:?}",
                err
            )),
        );
    }
}

if rfd::FileDialog::new().save_file() is ok and does not fail, otherwise the other thread will try to save to the default path, which does not exist.

[lonesometraveler]

OK. I have just updated the code.