Display staff badges on appended comments

![screen shot 2013-11-22 at 09 55 00](https://f.cloud.github.com/assets/1170410/1601353/638356f4-5386-11e3-8ef1-3cbfae3b893e.png)

Previously staff badges on comments on Next Gen were only appearing on Server-side generated comments. This fix ensures that any JS appended comments (such as a comment you just posted) have guardian staff badges if applicable.

![code-03](https://f.cloud.github.com/assets/1170410/1601411/a0e65d60-5387-11e3-82aa-d561ce19e685.gif)