iPad: tap on external link, wait through timer, return via Back button => modal still open

[aaronsnow]

Repro:

1. Visit 18f.gsa.gov on an iPad.
2. Tap on one of the external links.
3. Don't tap through the "You are leaving 18F" modal dialog; wait until the counter winds down and automatically sends you to the external page.
4. Once you're on the external page, tap the Back button.

Unwanted result: the "You are leaving 18F" modal reappears.

This result does not occur if you tap the modal's "Leave 18F" button instead of waiting through the countdown.

[jpyuda]

The modal is gone now, so this is no longer an issue.