Add support for attachment_fields_to_edit in the attachment details modal. props ericlewis. fixes #28991, see #24716.

git-svn-id: https://develop.svn.wordpress.org/trunk@29278 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/media-template.php

@@ -386,6 +386,7 @@ function wp_print_media_templates() {
 						<span class="value"><a href="{{ data.uploadedToLink }}">{{ data.uploadedToTitle }}</a></span>
 					</label>
 				<# } #>
+				<div class="attachment-compat"></div>
 			</div>
 
 			<a class="view-attachment" href="{{ data.link }}"><?php _e( 'View attachment page' ); ?></a> |