KSES: Add selected ARIA attributes support.

Allow low-privileged users to use the ARIA attributes `aria-describedby`, `aria-details`, `aria-label`, `aria-labelledby` and `aria-hidden`.

Merges [43731] to trunk.

Props mattheu, swissspidy, rianrietveld, afercia, GaryJ.
See #30421.

Built from https://develop.svn.wordpress.org/trunk@43984


git-svn-id: http://core.svn.wordpress.org/trunk@43816 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/kses.php

@@ -2119,12 +2119,17 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
  */
 function _wp_add_global_attributes( $value ) {
 	$global_attributes = array(
-		'class'  => true,
-		'id'     => true,
-		'style'  => true,
-		'title'  => true,
-		'role'   => true,
-		'data-*' => true,
+		'aria-describedby' => true,
+		'aria-details'     => true,
+		'aria-label'       => true,
+		'aria-labelledby'  => true,
+		'aria-hidden'      => true,
+		'class'            => true,
+		'id'               => true,
+		'style'            => true,
+		'title'            => true,
+		'role'             => true,
+		'data-*'           => true,
 	);
 
 	if ( true === $value ) {

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-43983';
+$wp_version = '5.1-alpha-43984';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.