Refactor: extract #page_index from WikiController#special

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4253 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/wiki/_sidebar.rhtml

@@ -5,5 +5,5 @@
 <h3><%= l(:label_wiki) %></h3>
 
 <%= link_to l(:field_start_page), {:action => 'index', :page => nil} %><br />
-<%= link_to l(:label_index_by_title), {:action => 'special', :page => 'Page_index'} %><br />
+<%= link_to l(:label_index_by_title), {:action => 'page_index'} %><br />
 <%= link_to l(:label_index_by_date), {:action => 'special', :page => 'Date_index'} %><br />