Feature request: notification when bed cools off

[pelican1997]

It would be nice to know when the bed cools off after a print finishes. Otherwise, I have to monitor the temperature until it cools down to room temperature. I can't use the 'Temperature Reached' option because the target is 'off' after the print completes (according to Octoprint), and it never gets down to zero. Maybe there could be some configurable limit that one could set to approximately the room temperature. Then after a print finishes, and it reaches that temperature, send a notification.