Works with mobile 832569

So, there are a few things here worth looking at review-wise.

1. I tweaked the simple table. Pretty sure I defined the fields right, but ... worth looking at.
2. It's worth verifying it works from FxOS, Firefox for Android and Firefox Desktop. I checked and it seems fine on all three for me.
3. I tweaked the /feedback/ route pattern so the / at the end is optional. Firefox for Android uses `http://m.input.mozilla.org/%LOCALE%/feedback` which I tweaked to `http://192.168.1.9:8000/%LOCALE%/feedback` in about:settings. Because there's no / at the end, I had to tweak the route pattern.
4. I tossed two hidden fields into SimpleForm so I could (ab)use form data validation. Maybe that's a lousy idea. I don't know.
5. Technically, Firefox for Android has two kinds of feedback: sad and idea. I'm lumping them both into sad. Maybe we should instead just ignore the ideas?

Anyhow, thoughts and r?