Changed abbr to display time with timeago in popup.js
Changed abbr to display time with timeago in popup.js

This fixes sue445/chrome-gitlab-notifier#75

sue445/chrome-gitlab-notifier,sue445/chrome-gitlab-notifier,brunosabot/chrome-gitlab-notifier,brunosabot/chrome-gitlab-notifier,hotoo/chrome-gitlab-notifier,hotoo/chrome-gitlab-notifier