TagSetPresenter: refactor to pass options explicitly.

Refactor tag_list_html, split_tag_list_html, and inline_tag_list_html to
take the `show_extra_links` and `current_query` options explicitly,
rather than implicitly relying on CurrentUser or taking `params[:tags]`
from the template.

app/presenters/post_set_presenters/favorite.rb

@@ -1,7 +1,8 @@
 module PostSetPresenters
   class Favorite < Base
     attr_accessor :post_set, :tag_set_presenter
-    delegate :favorites, :to => :post_set
+    delegate :favorites, :posts, :to => :post_set
+    delegate :tag_list_html, to: :tag_set_presenter
 
     def initialize(post_set)
       @post_set = post_set
@@ -11,13 +12,5 @@ module PostSetPresenters
         ).map {|x| x[0]}
       )
     end
-
-    def tag_list_html(template)
-      tag_set_presenter.tag_list_html(template)
-    end
-
-    def posts
-      @posts ||= post_set.posts
-    end
   end
 end