Adds a "visible" option on User and Project custom fields (#1738).

If set to false, the custom field won't be display on user profile/project overview.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4382 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/custom_value.rb

@@ -34,6 +34,10 @@ class CustomValue < ActiveRecord::Base
     custom_field.editable?
   end
   
+  def visible?
+    custom_field.visible?
+  end
+  
   def required?
     custom_field.is_required?
   end