"FIX": Add error reporting to NotifyMailingListSubscribers

Also skip unactivated users, which may actually fix this
FIX: under certain conditions, raw would change an cooked remain
  when editing a post
Merge pull request #2750 from riking/mailing-list-errors

"FIX": Add error reporting to NotifyMailingListSubscribers
tweak new topic styling
FIX: broken search for admins when selecting topics
FIX: regression, go to quoted post missing in quotes

refactors common code as well
factor common code
minor unread circle alignment fix
fixing alignment of unread post dot
Merge pull request #2752 from awesomerobot/master

minor unread circle alignment fix
FIX: highlight in yellow, not blue
FEATURE: highlight in title
Revert "fixing alignment of unread post dot"

This reverts commit 80f87e15d282d8eb3ff9c8c21ea03f19571cd78a.
Update topic-post.scss

fix read state position
try softening highlight on topic stop highlighting categories
FIX: ensure double flagging is impossible due to db constraint
minor hacking to get rails master to work

(note broken cause type mapping changed but close to working)

commented gemfile a bit
More highlight tweaking for search, makes it much easier to theme
Convert category helpers to ES6.
FIX: properly close topics in vBulletin importer

FEATURE: add backtrace when an exception happen (importers)
FIX: post-processing should also happen on first posts (vBulletin
importer)
PERF: faster topic bypass when already imported
Update Translations