Make sure to Normalize_C the filename when uploaded from xhr.

Author: cdujeu

core/src/plugins/access.fs/class.fsAccessDriver.php

@@ -732,6 +732,9 @@ public function switchAction($action, $httpVars, $fileVars)
                             $userfile_name = self::autoRenameForDest($destination, $userfile_name);
                         }
                         $this->logDebug("User filename ".$userfile_name);
+                        if(class_exists("Normalizer")){
+                            $userfile_name = Normalizer::normalize($userfile_name, Normalizer::FORM_C);
+                        }
 
                         // CHECK IF THIS IS A FORBIDDEN FILENAME
                         $this->filterUserSelectionToHidden(array($userfile_name));