showing configurations sidebar on social sharing settings area

Hi,

When I installed this extension I noticed that the **Social Sharing Settings** on the admin area had no sidebar.

The `edit.html.erb` template is now rendering the `configuration_menu` partial like the other configuration pages.

It is looking like this now:

![screen shot 2014-04-19 at 11 47 59 pm](https://cloud.githubusercontent.com/assets/1538066/2749919/3c43c428-c836-11e3-950a-c40ed3c2b5e7.png)