Titles in headers always have a margin left/right of 30% which is a lot for headers without buttons or with icon only buttons.
This PR adds two rules make the margins more responsive.
No support for old IE and WP7
The markup for links and the title has to be in the right order to support smaller margins for text only buttons (if not, standard margins will be used).
(The docs unfortunately do not)
http://jsfiddle.net/MauriceG/pxFga/show/light/ (edit: http://jsfiddle.net/MauriceG/pxFga/)