activeadmin/activeadmin — pull request #3638 by kissrobber (2014-11-20 17:12:44+00:00)
Title: fix favicon namespace

favicon setting in namespace is not working

```
ActiveAdmin.setup do |config|
config.namespace :admin2 do |admin2|
# this setting is not working
admin2.favicon = '/favicon2.ico'
end
end
```