reduce the loading delay in tab: https://bugzilla.redhat.com/show_bug.cgi?id=1103930
Improve accuracy of time estimates

This should be more accurate when the time to process one progress
unit is only a few milliseconds (or less than one millisecond).
(cherry picked from commit e21d51f9675a4c044aa6704ee27082070e6b5f0e)
Merge pull request #482 from zanata/rhbz1103930

reduce the loading delay in tab
Merge remote branch 'origin/release' into integration/master