Adds a project specific css class to body (#14767).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12170 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -488,6 +488,7 @@ module ApplicationHelper
       css << 'theme-' + theme.name
     end
 
+    css << 'project-' + @project.identifier if @project && @project.identifier.present?
     css << 'controller-' + controller_name
     css << 'action-' + action_name
     css.join(' ')