Merge pull request #1806 from bbs4us/master

Update Chinese Translation.
FIX: Scroll issue on Firefox when approaching the top post
Add a link to meta.discourse.org in the new version notification email.
FIX: sidekiq 100% CPU usage due to `ice_cube`
Applied markdown-js fixes from upstream
Show full dates with smaller font in topic lists
Version bump to v0.9.8.1
Rename favorite to starred everywhere