Add class to contextual edit button that relates to heading on wiki pages ().

Patch by Felix Gliesche.

git-svn-id: http://svn.redmine.org/redmine/trunk@15136 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -889,7 +889,7 @@ module ApplicationHelper
         content_tag('div',
           link_to('', options[:edit_section_links].merge(:section => @current_section),
                   :class => 'icon-only icon-edit'),
-          :class => 'contextual',
+          :class => "contextual heading-#{$2}",
           :title => l(:button_edit_section),
           :id => "section-#{@current_section}") + heading.html_safe
       else