When setting the website and email hooks for the Gtk2::AboutDialog widget, you should remember that the order is important: you should set the hook functions before setting the website and email URL properties, like this:
$about_dialog->set_url_hook(\&launch_web_browser); $about_dialog->set_website($app_website);
otherwise the AboutDialog will not display the website and the email addresses as clickable.
The dialog is shown nonmodally, and will be hidden by any response.
