Bug 1060694 - Next button stays active even after clearing the text fiel...

...ds during New Account setup
The i = 2 implies this was tested mostly against setup_account_info, and I think it is an effort to avoid disabling some of the resets. This should be made more generic though since FormNavigation is used on a few cards, notably setup_manual_config. So the loop should always cycle over all elements, but inside the loop, should not do the .disabled work if button.type is a 'reset'.