function front_page_menu_item(){
  $frontid = get_option('page_on_front');
  add_menu_page('Front Page', 'Front Page', 'manage_options', '/post.php?post='.$frontid.'&action=edit', '', 'dashicons-welcome-write-blog', 4);
}
add_action('admin_menu', __NAMESPACE__ . '\\front_page_menu_item');