Selecting a metric whose "Collection Interval" is "NONE" and clicking the "DISABLE COLLECTION" button, does not display any message.
Steps to Reporduce:
In the Health screen of a resource,
1. Select "METRIC DATA" tab .
2. Select a metric whose "Collection Interval" shows "NONE".
3. Select " DISABLE COLLECTION" button.
4. No message is displayed.
It would be appropriate if a message stating "it is already disabled" is displayed.
Also maybe the 'Disable Collection' link itself should be disable when none of the selected metrics in the collection has No interval.