Improve comments blocks for Marketplace
*Created by: ericpoirier* Attached is a screenshot of 2 comments on the Marketplace website that contains urls that are longer than the box themselves. I suggest that we apply an "overflow: auto" to add an horizontal scroll bar to comment posts if needed. This way the text will never go outside the boxes as displayed in the following screenshot: ![Screen Shot 2019-05-06 at 7 39 13 AM](https://user-images.githubusercontent.com/623165/57222927-6502ac00-6fd2-11e9-9ca5-55eccdab7728.png)
issue

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