On the Tesla app under Controls there is an icon labeled "Start." When I click on it it starts a count down from 2 minutes but other than that I can't figure out what it does. I don't notice any changes inside the car. After the countdown is complete it says "Active" and after that the only way I have found to return it to the "Start" position is to get out of the app entirely. Can someone please tell me what its' purpose is.