Sanitize.php: Erlaubt neu auch leere Eingaben

extension/qfq/qfq/helper/Sanitize.php

@@ -143,7 +143,7 @@ class Sanitize {
             SANITIZE_ALLOW_MIN_MAX => '',
             SANITIZE_ALLOW_MIN_MAX_DATE => '',
             SANITIZE_ALLOW_PATTERN => '',
-            SANITIZE_ALLOW_ALLBUT => '^[^\[\]{}%&\\#]+$',
+            SANITIZE_ALLOW_ALLBUT => '^[^\[\]{}%&\\#]*$',
             SANITIZE_ALLOW_ALL => '.*'
         ];
     }