* Add moderator role and add pundit policies for admin actions
* Add rake task for turning user into mod and revoking it again
* Fix handling of unauthorized exception
* Deliver new report e-mails to staff, not just admins
* Add promote/demote to admin UI, hide some actions conditionally
* Fix unused i18n
* Show the local couterpart of emoji when it exists in admin/custom_emojis
* Fix indentation
* Fix error
* Add class table-action-link to Overwrite link
* Make it enable to overwrite emojis
* Make Code Climate happy