Allow user to check how much sleep they have had without having to turn off sleep tracking

From Ross McCarthy on 2016/12/24 13:07:02 +0000

There is a sleep track timer, but this only tells you how long you’ve been tracking and not how long you’ve been sleeping

Copied from original feature request: http://urbandroid.uservoice.com/forums/264867-sleep-as-android/suggestions/17537689-allow-user-to-check-how-much-sleep-they-have-had-w