FIX: Centralize Top rendering, remove old code paths. Fix some bugs.

app/serializers/topic_list_serializer.rb

@@ -4,7 +4,8 @@ class TopicListSerializer < ApplicationSerializer
              :more_topics_url,
              :draft,
              :draft_key,
-             :draft_sequence
+             :draft_sequence,
+             :for_period
 
   has_many :topics, serializer: TopicListItemSerializer, embed: :objects
 
@@ -12,6 +13,10 @@ class TopicListSerializer < ApplicationSerializer
     scope.can_create?(Topic)
   end
 
+  def include_for_period?
+    for_period.present?
+  end
+
   def include_more_topics_url?
     object.more_topics_url.present? && (object.topics.size == SiteSetting.topics_per_page)
   end