Makes the wiki sidebar editable (#5208).

The content of the wiki page named 'Sidebar' is rendered in the sidebar if it exists. Permission to edit protected pages is required to create this page.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3632 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/wiki_content.rb

@@ -34,6 +34,10 @@ class WikiContent < ActiveRecord::Base
     page.project
   end
   
+  def attachments
+    page.nil? ? [] : page.attachments
+  end
+  
   # Returns the mail adresses of users that should be notified
   def recipients
     notified = project.notified_users