Input item hidden under keyboard when app is saved to Home Screen on iOS
There seems to be an issue with input fields when a web page is saved to the home screen on iOS devices. 
#### Steps to reproduce the bug
1. Open the [Demo URL](http://f.cl.ly/items/143J2f0B3Z2x0p3R0J1B/form-input-bug.html) in mobile safari on the iOS simulator or on a device (iPhone, iPad screen is big so bug is less evident)
2. Save the page to the home screen as a mobile web app
3. Open the mobile web app
4. Click on the last input field
#### The issue

Note: The web page must be saved to home screen in order to reproduce this issue. 

When you click on the last input field, the iOS keyboard shows up over the field. The expected behavior is for the parent view of the input field to scroll up with the keyboard. This happens in mobile safari, but not when the page is on the home screen. 

This makes input fields in the bottom 40% of the screen unusable. Have you encountered this before? Is there a know fix? 

[JSFiddle](http://jsfiddle.net/agBBr/) 
[Demo URL](http://f.cl.ly/items/143J2f0B3Z2x0p3R0J1B/form-input-bug.html)
