We have APM and NPM. When an Application status is down or warning, I see a small blinking red or yellow dot on top of that node's status icon (which is usually green of course). I'd like to have custom NPM pollers do the same thing - so that when an alert condition is met, there would be a small blinking yellow or red dot for that node. That way, I can see at a glance which nodes are having trouble, without having to flip through the list of active alerts.
How would I do this?