change test to slider for disk create

app/UI/Disk/Forms/UpdateForm.php

@@ -64,7 +64,7 @@ class UpdateForm extends BaseForm implements ClientArea
             __FUNCTION__,
             $vm,
             'Debug',
-            $this->resourceManager
+            $vm->getHardDisks()
         );
 
         $field = new Range('additionalDiskSize', 20, $this->resourceManager->disk()->free());