Redesign admin accounts index (#9340)

* Improve overview of accounts in admin UI

- Display suspended status, role, last activity and IP prominently
- Default to showing local accounts
- Default to not showing suspended accounts

* Remove unused strings

* Fix tests

* Allow filtering accounts by IP mask

config/locales/co.yml

@@ -123,10 +123,6 @@ co:
       most_recent_ip: IP più ricente
       no_limits_imposed: Nisuna limita imposta
       not_subscribed: Micca abbunatu
-      order:
-        alphabetic: Alfabeticu
-        most_recent: Più ricente
-        title: Urdine
       outbox_url: URL di l’outbox
       perform_full_suspension: Suspende
       profile_url: URL di u prufile