* Fix unused role routes being generated
* Remove unused JavaScript code
* Refactor filters code to be DRYer
* Fix `.count == 0` comparisons to `.empty?` in views
* Fix filters in views
* Make custom emoji domains case sensitive #9351
* Fixup style in downcase_domain to comply with codeclimate.
* switch if! to unless
* Don't use transactions, operate in batches.
Also revert spurious schema change.
Eugen Rochko