alphagov/static — pull request #435 by dsingleton (2014-08-12 16:56:50+00:00)
Title: Track when we show the browser upgrade prompt

At the moment it's getting quite a lot of negative feedback, and knowing who actually
sees it will help use decide how to respond to that.

We've been inferring this from traffic to the /help/browsers page, but that only captures
users who are clicking on the banner. This will record exactly who sees it.