rails/turbolinks — pull request #440 by javan (2014-12-08 00:23:45+00:00)
Title: Fix that the progress bar would fill the entire screen in Safari 6

Perhaps some kind of stacking context (https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Understanding_z_index/The_stacking_context) issue.

Fixes #436
Closes #437