I wanted to add a whisper sensor to my existing system. I accidentally added it as a new device. I did eventually add the new whisper sensor to my original device. The issue is I now have two devices in the app. The first is a device named Sprinkle that has my three whisper sensors attached and a second device named Plant Sensor with nothing attached to it. I want to delete the device named Plant Sensor. I cannot find a way to delete it.