Add post-type-$post_type and taxonomy-$taxonomy admin body classes.

props johnbillion.
fixes #19247.

Built from https://develop.svn.wordpress.org/trunk@25124


git-svn-id: http://core.svn.wordpress.org/trunk@25104 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin-header.php

@@ -80,6 +80,12 @@
 if ( is_rtl() )
 	$admin_body_class .= ' rtl';
 
+if ( $current_screen->post_type )
+	$admin_body_class .= ' post-type-' . $current_screen->post_type;
+
+if ( $current_screen->taxonomy )
+	$admin_body_class .= ' taxonomy-' . $current_screen->taxonomy;
+
 $admin_body_class .= ' branch-' . str_replace( array( '.', ',' ), '-', floatval( $wp_version ) );
 $admin_body_class .= ' version-' . str_replace( '.', '-', preg_replace( '/^([.0-9]+).*/', '$1', $wp_version ) );
 $admin_body_class .= ' admin-color-' . sanitize_html_class( get_user_option( 'admin_color' ), 'fresh' );