bug: data update event is canceling the autocomplete popup

[coolaj86]

Oh, the struggles of data binding: The autocomplete is no longer working.

I believe this may be related to the changes made for the URL linking to work (changing input values as part of the update functions).

Possible things to investigate:

• maybe create an updateInputs() that is separate from other updates and only called on init
• maybe increase the debounce time to 250ms (higher than that just annoys me personally)
• maybe don't let onkeyup events update its own input.value

It could also be that updating the http-post-preview input is causing the focus to shift from the current input. If that's the case, we may need to switch it from textarea to <code><pre>.