Display staff badges on appended comments

![screen shot 2013-11-22 at 14 57 12](https://f.cloud.github.com/assets/1170410/1601470/a918a10e-5388-11e3-81b6-49d4de72caae.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)