props kovshenin. see [27964], see #27452. Built from https://develop.svn.wordpress.org/trunk@27990 git-svn-id: http://core.svn.wordpress.org/trunk@27820 1a063a9b-81f0-0310-95a4-ce76da25c4cd
wp.customize.Widgets.WidgetControl
async_upload_{$type}
/wp-admin/includes/dashboard.php
sidebar_admin_setup