MUMPO-362: Marketplace Details and Add to Home overlapping

Fixing the issue where on mobile, the Details link overlaps the Add to Home button.

Before:
![image](https://cloud.githubusercontent.com/assets/1919535/5570843/aaa34950-8f4d-11e4-82b6-d0f805e2d513.png)

After:
![image](https://cloud.githubusercontent.com/assets/1919535/5570847/bbaa1800-8f4d-11e4-996d-9a718de8a601.png)