Fixed Filtering for files, always threat as multiple

system/src/Grav/Common/Data/Validation.php

@@ -301,15 +301,7 @@ class Validation
 
     protected static function filterFile($value, array $params, array $field)
     {
-        if (isset($field['multiple']) && $field['multiple'] === true) {
-            return (array) $value;
-        }
-
-        if (is_array($value)) {
-            return reset($value);
-        }
-
-        return $value;
+        return (array) $value;
     }
 
     /**