Editor scrolling:

* Make sure the background color for tools is only applied to the main editor.
* Fix toolbar width for smaller screens.
* Ensure toolbar doesn't end up in a weird place when scrolling down too fast.
* Avoid JS errors for post types that don't support the editor.

props avryl. see #28328.

Built from https://develop.svn.wordpress.org/trunk@29075


git-svn-id: http://core.svn.wordpress.org/trunk@28861 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/edit-form-advanced.php

@@ -11,7 +11,10 @@ if ( !defined('ABSPATH') )
 	die('-1');
 
 wp_enqueue_script('post');
-wp_enqueue_script('editor-expand');
+
+if ( post_type_supports( $post_type, 'editor' ) ) {
+	wp_enqueue_script('editor-expand');
+}
 
 if ( wp_is_mobile() )
 	wp_enqueue_script( 'jquery-touch-punch' );