Pull check-in admin changes from checkin-kiosk branch.

I should have separated these out to begin with.
Release 3.0.0 beta 1.
Tweak admin dashboard UI.
Show formatted time on syncs listing.
Merge branch 'master' into checkin-kiosk
Merge branch 'checkin-kiosk' of github.com:churchio/onebody into checkin-kiosk