The egg timer just means it hasn't received any transmissions from the temperature sensor in the zone since the controller was rebooted, as they are...
This started out as a query in another thread however after finding a solution that I like I thought the solution itself was worthy of its own thread...
Not quite what you're looking for, but you might be interested to know that the Kasa controlled TP-Link devices like the Smart bulbs and smart plugs...
I got the email announcing 4.8 too, got all excited that we might finally have got an overhaul to the app - which is pretty cumbersome and clunky to...