Fix a:focus styling and backwards tabbing, add tabindex arg for <a>, see #19088

git-svn-id: https://develop.svn.wordpress.org/trunk@19207 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/admin-bar.php

@@ -179,6 +179,7 @@ function wp_admin_bar_my_account_menu( $wp_admin_bar ) {
 			'href'   => $profile_url,
 			'meta'   => array(
 				'class' => 'user-info user-info-item',
+				'tabindex' => -1
 			),
 		) );
 		$wp_admin_bar->add_menu( array(