Gray action buttons on conversation show page are too large

One the conversation show page the gray action buttons span half the page. They should span the width of the text only and be aligned with the right hand side of the page.

![screen shot 2013-07-10 at 11 30 38 am](https://f.cloud.github.com/assets/1521387/773809/903c24bc-e943-11e2-903e-a74cd920121f.png)