Translation for various hard-coded strings (#577).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1143 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -95,6 +95,10 @@ module ApplicationHelper
     l(:label_added_time_by, author || 'Anonymous', time_tag)
   end
   
+  def l_or_humanize(s)
+    l_has_string?("label_#{s}".to_sym) ? l("label_#{s}".to_sym) : s.to_s.humanize
+  end
+  
   def day_name(day)
     l(:general_day_names).split(',')[day-1]
   end