CLEANUP: This file no longer seems to be used
Revert "CLEANUP: This file no longer seems to be used"

This reverts commit 5c2893c8f9c2b64e99f24cf75f525ec1ac693bb9.
ES6: Transition helper
FIX: Heatmaps for posts not showing up if you're not colourblind :)
FIX: Don't show Sign Up button in cases where users can't sign up
UX: Remove drag and drop reordering of categories. It was not working
perfectly and you can re-order using the modal number.
FIX: On devices with a weird pixel ratio, tests were failing.
fix incorrect link to category position change
FIX: Only show like heat map when there are 10 posts
UX: Don't show sign up button when the header has extra info in it
REMOVE: Discourse Task gem -- It's not a plugin, I don't think anyone
uses it and I doubt it works.
FIX: preview bust when no params
adding hover state to notification menu, and small additional fixes
Merge pull request #2646 from awesomerobot/master

adding hover state to notification menu, and small additional fixes
notification dropdown should not be selectable
clean up some flag page styles and alignment
clarify New User Tips = Guidance
ES6: More controllers converted over
ES6: Mega update of controllers
FIX: Don't capitalize category name in document title