Touch up launch-nav

Summary:
Minor cleanup to the launch nav, this is more an interim diff until I can fully re-think the side

- Cleaner text
- Slighly shorter buttons
- Squarish counts
- Less in your face warning colors

Test Plan: Test with and without counts, test mobile

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin, chad

Differential Revision: https://secure.phabricator.com/D8637