ipython/ipython — pull request #7302 by Carreau (2014-12-23 22:22:57+00:00)
Title: a few 1 pixel fixes.

this uses the same html/css structure across the tabs, and reduce the overlay
click zone that expended the size of the header to 25px instead of 24px

ping @jdfreder, @ellisonbg

Before that the `refresh` and table between tabs were jumping around by 1px.