Start IFTTT "sleep_tracking_started" after Delayed Sleep Tracking starts

From Martin Butt on 2016/05/13 17:07:18 +0000

Currently the IFTTT trigger for “sleep_tracking_started” starts as soon as you press the sleep taking button. It would be better if states after the Delayed Sleep Tracking period. This way users can use this to switch off lights, etc. after the timer.

Copied from original feature request: