Improve projects list layout

Summary:
this:
https://www.dropbox.com/s/nkofeeq1p08hpyt/Screenshot%202014-11-26%2015.44.41.png?dl=0

instead of this:
https://www.dropbox.com/s/y4zp629icf6slxt/Screenshot%202014-11-26%2015.45.12.png?dl=0

'float' is bad

Reviewers: cramer

Reviewed By: cramer

Differential Revision: https://tails.corp.dropbox.com/D77557