Ticket #22924: theme-editor.patch

wp-admin/theme-editor.php

@@ -62 +62 @@
 $has_templates = ! empty( $allowed_files );
 $style_files = $theme->get_files( 'css' );
 $allowed_files['style.css'] = $style_files['style.css'];
-$allowed_files += $style_files;
+$allowed_files += apply_filters( 'wp_theme_editor_filetypes', $style_files, $theme );
 
 if ( empty( $file ) ) {
         $relative_file = 'style.css';