Right now after creating a FileDialogOptions and showing it:
let options = FileDialogOptions::new().multi_selection(); ctx.submit_command(commands::SHOW_OPEN_PANEL.with(options))
it can only be handled with the cmd.get(commands::OPEN_FILE). I have implemented a case for cmd.get(commands::OPEN_FILES) in my AppDelegate, but couldn't find a way to call it.