F9686 - partly revert download filename sanitize

extension/Classes/Core/Report/Link.php

@@ -1529,8 +1529,8 @@ EOF;
         // By default, qfq saves everything HTML encoded. E.g. in form ''' - decode them back to regual UTF-8 text.
         $filename = html_entity_decode($vars[DOWNLOAD_EXPORT_FILENAME], ENT_QUOTES | ENT_XML1, 'UTF-8');
 
-        // Remove unsafe characters.
-        $vars[DOWNLOAD_EXPORT_FILENAME] = Sanitize::safeFilename($filename);
+        // Remove unsafe characters. For '... AS _savePdf' slashes have to be allowed.
+        $vars[DOWNLOAD_EXPORT_FILENAME] = Sanitize::safeFilename($filename, false, true);
 
         return $vars;
     }