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

...ds during New Account setup
When using a setTimeout, best to indicate why it was used, as usually it can be a sign of compensating for something that may need to be addressed at the root cause.

If this was a speculative use, about concerns that this logic may be slow and block other things, then I would not bother with the setTimeout. We can revisit later if it is measured to be slow. From my testing before, it seemed fine without it.