zurb/foundation — pull request #3270 by sime (2013-09-16 08:15:14+00:00)
Title: Full screen modal/reveal on small screens

I think modals are awfully cramped on small screens when they contain a form.

Here I have provided a switch to expand all the class options (tiny, small, medium, large and xlarge) to 100% width on small screens.

It's set to false by default otherwise it would be considered a regression.