Widgets:

- Don't deactivate "draggable" on the widget when the chooser is open. Makes it possible to still drag the "widget-in-question".
- Change the chooser's HTML id to a class to avoid collisions when cloning.
- Refresh the "sortable" positions when an open widget is dragged. Fixes problems moving the widget up or down in the same sidebar.
See #25821

git-svn-id: https://develop.svn.wordpress.org/trunk@26366 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/widgets.php

@@ -428,7 +428,7 @@ foreach ( $theme_sidebars as $sidebar => $registered_sidebar ) {
 <br class="clear" />
 </div>
 
-<div id="widgets-chooser">
+<div class="widgets-chooser">
 	<ul class="widgets-chooser-sidebars"></ul>
 	<div class="widgets-chooser-actions">
 		<button class="button-secondary"><?php _e( 'Cancel' ); ?></button>