//517nav_expanded_sidebar
// expand folder tree by default in sidebar
$_prefs['nav_expanded_sidebar'] = array(
    'value' => 0,
    'locked' => false,
    'shared' => false,
    'type' => 'enum',
    'enum' => array(0 => _("No"),
                    1 => _("Yes"),
                    2 => _("Current expanded status in the folders view")),
    'desc' => _("Expand the entire folder tree by default in the sidebar?"));
