Accessibility: Taxonomy: Correct keyboard navigation for the Tags meta box in classic editor.

Props sabernhardt, almendron, jose64, alexstine, joedolson, ryokuhi.
Fixes #52408.
Built from https://develop.svn.wordpress.org/trunk@50363


git-svn-id: http://core.svn.wordpress.org/trunk@49974 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/forms-rtl.css

@@ -705,9 +705,12 @@ ul#add-to-blog-users {
 }
 
 /* Colors for the tags autocomplete. */
-.wp-tags-autocomplete .ui-state-focus {
+.wp-tags-autocomplete .ui-state-focus,
+.wp-tags-autocomplete [aria-selected="true"] {
 	background-color: #2271b1;
 	color: #fff;
+	/* Only visible in Windows High Contrast mode */
+	outline: 2px solid transparent;
 }
 
 /*------------------------------------------------------------------------------

wp-admin/css/forms.css

@@ -704,9 +704,12 @@ ul#add-to-blog-users {
 }
 
 /* Colors for the tags autocomplete. */
-.wp-tags-autocomplete .ui-state-focus {
+.wp-tags-autocomplete .ui-state-focus,
+.wp-tags-autocomplete [aria-selected="true"] {
 	background-color: #2271b1;
 	color: #fff;
+	/* Only visible in Windows High Contrast mode */
+	outline: 2px solid transparent;
 }
 
 /*------------------------------------------------------------------------------

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-beta2-50362';
+$wp_version = '5.7-beta2-50363';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.