Media: Display the unsaved changes dialog in image edit form using jQuery `.text()` function.

This ensures that HTML entities like non-breaking spaces are properly displayed instead of being encoded.

Props jdy68, sebastienserre, audrasjb, mukesh27, SergeyBiryukov.
Fixes #54232.
Built from https://develop.svn.wordpress.org/trunk@51907


git-svn-id: http://core.svn.wordpress.org/trunk@51500 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/image-edit.js

@@ -893,7 +893,7 @@
 			pop = this.intval( $('#imgedit-undone-' + postid).val() );
 
 		if ( pop < history.length ) {
-			if ( confirm( $('#imgedit-leaving-' + postid).html() ) ) {
+			if ( confirm( $('#imgedit-leaving-' + postid).text() ) ) {
 				return false;
 			}
 			return true;

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51906';
+$wp_version = '5.9-alpha-51907';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.