- all inputs should have labels
  - eliminated placeholder, which should only be used for examples
  - simulated placeholder interaction (disappear on input)
  - for usability, I don't think we should hide the label, but I'm
    not trying to redesign here
- focus highlight for locate button now surrounds the whole icon
  - this shifts the button's position slightly but I think it's fine
- added alt text to locate icon

Also removed `console.log` which probably shouldn't be in production.

This fixes some of the low-hanging WCAG fruit (techforwarren#23).

The icon after "SHE HAS A PLAN FOR THAT" doesn't have any semantic
content, it's just decorative. I added an empty alt text so that
accessibility checkers will know it's empty on purpose.