Merge pull request #2671 from akshaymohite/optimization-fixes

removed useless assignments at some places
FIX: unhide post when a moderator undos the flag on which s/he took action
FIX: public_user_custom_fields are returned by UserSerializer
FIX: Don't try and delete inactive admins, rare as they may be.
TRIVIAL: Don't show 06 Aug, show 6 Aug
clarify on flag reply "more" indicator
UX: Show User popup when clicking on a user in the topic list.
FIX: Load `user-avatar` first.
FIX: Allow links to `name` attributes
update new user tips for less columns , emoji
FIX: add http:// to feed_polling_url if it's missing
add glyph to move dialog button
remove right-arrow on cross-topic oneboxes
Only show unique badge titles in the Badge Title dropdown

Filter the preference Badge Title to only show unique badge title names.
https://meta.discourse.org/t/set-title-dialog-shows-multiple-instances-of-the-same-badge/19071
Only show unique badge titles in the Badge Title dropdown

Filter the preference Badge Title to only show unique badge title names.
Updated to use lodash
https://meta.discourse.org/t/set-title-dialog-shows-multiple-instances-of-the-same-badge/19071
Merge pull request #2672 from cpradio/master

Only show unique badge titles in the Badge Title dropdown
remove <hr> between Popular Posts in email digest
minor top copy tweak
VANILLA: use latest activity as user's profile by default
FIX: You need to be logged in to edit wiki posts.