Adds previous/next links to issue (#2850).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8488 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/sort_helper.rb

@@ -160,7 +160,8 @@ module SortHelper
   # sort_clause.
   # - criteria can be either an array or a hash of allowed keys
   #
-  def sort_update(criteria)
+  def sort_update(criteria, sort_name=nil)
+    sort_name ||= self.sort_name
     @sort_criteria = SortCriteria.new
     @sort_criteria.available_criteria = criteria
     @sort_criteria.from_param(params[:sort] || session[sort_name])