Reduce min-width of nav links


![screenshot from 2013-10-29 08 25 54](https://f.cloud.github.com/assets/808895/1426111/a51df504-405a-11e3-8d5a-3e9de7f43040.png)
RDRT menu item wraps to second line: Reduce the min-width by 10px wraps all
navigation on one line