improve keyboard shortcut help layout
hide sign up button from header on mobile
curse you misaligned semicolon
swapping around heatmap low/high
Merge pull request #2654 from awesomerobot/master

swapping around heatmap/coldmap low/high
FIX: Edit category should use the id always in case two categories have
the same slug.
Add support for `max_posts` query param. Also make it easier to let
Ember support query params for sorting our tables. Just add it in one
place.
Add login buttons to create account template.
FIX: If local logins are disabled, sign up button should not show the
form.
FIX: handle importing usernames that are too short, too long, or have invalid characters
Avoid using to_s when performing String Interpolation
FIX: Metamorph error due to malformed HTML
FIX: confusing UI when clicking Delete All Posts button
FIX: PostDestroyer needs to update user stats. Delete All Posts button was broken, making it impossible to delete users.
UX: Squash activity columns together. Show a cold map on the difference
between the last post and original post dates. Fix some missing classes
in the mobile templates and topic map.
FEATURE: export user list
clean up exports weekly
Merge pull request #2656 from akshaymohite/optimization-fixes

Avoid using to_s when performing String Interpolation
Merge pull request #2655 from techAPJ/patch-3

FEATURE: export user list
FIX: add referer to version_check request