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/hu.yml

@@ -92,10 +92,6 @@ hu:
       most_recent_activity: Legutóbbi tevékenységek
       most_recent_ip: Legutóbbi IP-cím
       not_subscribed: Nincs feliratkozás
-      order:
-        alphabetic: Alfabetikus
-        most_recent: Legutóbbi
-        title: Rendezés
       outbox_url: Kimenő üzenetek URL
       perform_full_suspension: Teljes felfüggesztés
       profile_url: Profil URL