Port widgets to 2.3

[rob1n]

Really just applying the patch, but I would like to have a ticket to reference.

(In [5297]) Widgets for 2.3. fixes #4186

Since i've not seen a reference to this issue yet anywhere..

This Changeset has broken trunk; Specifically widgets.php redefines most of the functions.

232	function wp_get_sidebars_widgets() {
1151	function wp_get_sidebars_widgets() {

188	if ( !function_exists( 'is_active_widget' ) ) {
189	    function is_active_widget( $callback ) {
1107	if ( !function_exists( 'is_active_widget' ) ) {
1108	    function is_active_widget( $callback ) {

Just to name a few, It looks like the content of widgets.php is doubled up, starting from line 920. ​http://trac.wordpress.org/browser/trunk/wp-includes/widgets.php?rev=5297#L920

What rev where you at DD32? (Please always include)

[5300] should resolve.