Clean up the sticky menu and responsive tweaks JS:

- More descriptive names.
- Share cached jQuery elements.
- Fix re-enabling of touch events on the admin menu.
- Fix disabling/enabling of UI Sortable.
Props tollmanz, props sanchothefat, see #26086, fixes #26088.

git-svn-id: https://develop.svn.wordpress.org/trunk@26402 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/admin-bar.php

@@ -165,7 +165,7 @@ function wp_admin_bar_wp_menu( $wp_admin_bar ) {
 function wp_admin_bar_sidebar_toggle( $wp_admin_bar ) {
 	if ( is_admin() ) {
 		$wp_admin_bar->add_menu( array(
-			'id'    => 'toggle-button',
+			'id'    => 'menu-toggle',
 			'title' => '<span class="ab-icon"></span>',
 			'href'  => '#',
 			'meta'  => array(