Added/Updated admin dashboard tables

• Added:
- New Account filtering
- PreviewCard viewing/sorting/filtering deleting (todo)
- DeletePreviewCardWorker, Service
- Status viewing/sorting/filtering deleting
- ChatMessage viewing/sorting/filtering deleting (todo)
- Account > Follows view

• Updated:
- LinkBlock to sort alphabetically
- Groups to be under "Moderation" instead of "Admin" in navigation.rb
- Status in admin to have group name/link
- Reports reset button
- Group filtering/sorting
- LinkBlock filtering/sorting
- Account now has bio and few more data points in dashboard

app/services/delete_preview_card_service.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class DeletePreviewCardService < BaseService
+  include Redisable
+
+  def call(preview_card)
+    return if preview_card.nil?
+
+    @preview_card = preview_card
+
+    RedisLock.acquire(lock_options) do |lock|
+      if lock.acquired?
+        @preview_card.destroy!
+      else
+        raise GabSocial::RaceConditionError
+      end
+    end
+  end
+
+  def lock_options
+    { redis: Redis.current, key: "distribute_preview_card:#{@preview_card.id}" }
+  end
+end