hide backup compression select

app/UI/BackupJob/Forms/CreateForm.php

@@ -102,6 +102,7 @@ class CreateForm extends BaseForm implements ClientArea
         ]);
         $field->setDefaultValue('zstd');
         $field->notEmpty();
+        $field->addClass('hidden');
         $this->addField($field);
         //mode
         $field = new Select('mode');