Only use timeago for < 1 day

Beyond very recently, timago is not useful for the kinds of
comparisons storyboard users perform (aligning bug reports with
commit times, etc).  Reduce the use of timeago to only times
within the past day.

Change-Id: Ifea1c982654c40b394a7c8d9fcbd90d505b21daa
Merge "Only use timeago for < 1 day"