Collector Down - Functionality to Enable / Disable Down events for Managed Nodes

This is for standalone none resilient collectors. A "Collector Down" can cause multiple associated node down alerts. It would be a good to have the option to Suppress associated Node Down alerts created from a Collector Down event.

So Collector down is a Root Cause Alert and the associated Device Downs from devices that are managed by the collector are suppressed / dampened, until the collector is back on line, if there is an outstanding dampened alert for a down device, that has not cleared when the collector is back on line then this is then released into the LM browser.

Obviously the best solution is to have a resilient set up, but unfortunately this is not always the case with customers.