twitter/bootstrap — pull request #7788 by nextgenthemes (2013-05-04 19:57:06+00:00)
Title: Fixed hidden navbar dropdowns on mobiles, corrected header.

Currently drowdowns are hidden/cut-off on mobile devices. This way they are shown. Save because only applied if the menu is actually open, in that stage there is no need for `overflow: hidden;`

Also there was a header text copy pasted that was wrong.