chg: [genericForm] Allow empty option in selector

templates/element/genericElements/Form/Fields/dropdownField.php

@@ -1,6 +1,7 @@
 <?php
     $controlParams = [
         'options' => $fieldData['options'],
+        'empty' => $fieldData['empty'] ?? false,
         'class' => ($fieldData['class'] ?? '') . ' formDropdown custom-select'
     ];
     echo $this->FormFieldMassage->prepareFormElement($this->Form, $controlParams, $fieldData);