[Ovmsdev] How to remove temperatures from app?

In the iMiev, the CAN bus stops when the car is parked and not charging, which means that the temperatures go stale. I want to flag this to the app, but I'm not sure how to do that. I assumed that setting them back to their "default" state would return the app to displaying "-" This doesn't seem to work. Should it? Matt Beard P.S. Now we have iMiev support (although a bit beta) and are about to get Leaf support - when do we get these car picture in the app? ;-)