hide snapshot ram option

app/UI/Snapshot/Forms/CreateForm.php

@@ -65,6 +65,8 @@ class CreateForm extends BaseForm implements ClientArea
         {
             //vmstate
             $field = new Switcher("vmstate");
+            $field->setDefaultValue("on");
+            $field->addClass('hidden');
             $this->addField($field);
         }
         //description