Ignores parent directory on macOS

[dceddia]

I ran into an issue where a Save dialog that's been given a path and a filename doesn't open to the given path. I'm using Tauri, but I think the issue is in rfd, in the set_path function.

At the beginning, it appends the filename to the directory name. And then at the end, it calls file_url_with_path and passes is_dir = true, which makes me think that maybe it's a mistake to have pushed the filename onto the path? At least from the Apple docs on directoryURL it looks like that's meant to be a directory path without a filename.

    pub fn set_path(&self, path: &Path, file_name: Option<&str>) {
        // if file_name is some, and path is a dir
        let path = if let (Some(name), true) = (file_name, path.is_dir()) {
            let mut path = path.to_owned();
            // add a name to the end of path
            path.push(name);
            path
        } else {
            path.to_owned()
        };

        if let Some(path) = path.to_str() {
            unsafe {
                let url = NSURL::file_url_with_path(path, true);
                let () = msg_send![self.panel, setDirectoryURL: url];
            }
        }
    }