Alerts UI: Unable to edit all configs of Alert definition (Web UI type)

Deployed a cluster with default configs for stack2.2.
Navigate to Alerts page.
Try to change any config value for Oozie server web ui, Datanode webUI, Nodemanager WebUI, Historyserver WebUI.... even after the change, Save button was not enabled.
if tried to navigate to some other page, there is a popup which says there are unsaved changes, still save button is not enabled there.