* Display appropriate error when performing unpermitted operation on custom emoji

Fixes #13897

* Remove links to custom emoji actions not performable by moderators

* 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

Fix #3804, Fix #5776

* Add logging of admin actions

* Update brakeman whitelist

* Log creates, updates and destroys with history of changes

* i18n: Update Polish translation (#5782)

Signed-off-by: Marcin Mikołajczak <me@m4sk.in>

* Split admin navigation into moderation and administration

* Redesign audit log page

* 🇵🇱 (#5795)

* Add color coding to audit log

* Change dismiss->resolve, log all outcomes of report as resolve

* Update terminology (e-mail blacklist) (#5796)

* Update terminology (e-mail blacklist)

imho looks better

* Update en.yml

* Fix code style issues

* i18n-tasks normalize

* 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

* Fix #5351 - Redirection with page params after copy emoji

* Add page params to copy emoji link

* Admin interface for listing, adding and removing custom emojis

* Only display local ones in the list