Proper heading for admin screens.

First step towards restoring a good heading structure in wp-admin.
The previous `<h1>` contained the site title and a link to the front page and was removed with the toolbar refactoring in 3.2.

Props joedolson, afercia.
Fixes #31650.



git-svn-id: https://develop.svn.wordpress.org/trunk@32974 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/media.php

@@ -103,13 +103,13 @@ case 'edit' :
 ?>
 
 <div class="wrap">
-<h2>
+<h1>
 <?php
 echo esc_html( $title );
 if ( current_user_can( 'upload_files' ) ) { ?>
 	<a href="media-new.php" class="add-new-h2"><?php echo esc_html_x('Add New', 'file'); ?></a>
 <?php } ?>
-</h2>
+</h1>
 
 <form method="post" class="media-upload-form" id="media-single-form">
 <p class="submit" style="padding-bottom: 0;">