Check that current changes can be lost before editing another comment.

When replying to or editing a comment, double-clicking another comment will
open it in quick edit and changes to the current comment are lost.

Props pareshradadiya, chriscct7.
Fixes #21845.



git-svn-id: https://develop.svn.wordpress.org/trunk@32857 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/script-loader.php

@@ -439,7 +439,8 @@ function wp_default_scripts( &$scripts ) {
 			'hotkeys_highlight_first' => isset($_GET['hotkeys_highlight_first']),
 			'hotkeys_highlight_last' => isset($_GET['hotkeys_highlight_last']),
 			'replyApprove' => __( 'Approve and Reply' ),
-			'reply' => __( 'Reply' )
+			'reply' => __( 'Reply' ),
+			'warnQuickEdit' => __( "Are you sure you want to edit this comment?\nThe changes you made will be lost." ),
 		) );
 
 		$scripts->add( 'xfn', "/wp-admin/js/xfn$suffix.js", array('jquery'), false, 1 );