change test to slider for disk create

app/UI/Disk/Forms/UpdateForm.php

@@ -48,7 +48,7 @@ class UpdateForm extends BaseForm implements ClientArea
         logModuleCall(
             'proxmoxCloud',
             __FUNCTION__,
-            $this->getData(),
+            parent::getData(),
             'Debug',
             ''
         );
@@ -62,7 +62,6 @@ class UpdateForm extends BaseForm implements ClientArea
 
     private function initFields()
     {
-        parent::initContent();
         //entity id
         $this->addField(new Hidden("id"));
         //size