Hide display date fields when date is confirmed

* When the date is confirmed, the display must be exact — in research users were confused when they selected a date that the radio option changed but that they were still able to switch it back to one or two month precision
* Instead, switch to exact, lock the form field and hide the one and two month options
* Include (confirmed) text within example dates

- [x] code review
- [x] product review

See video example:
https://drive.google.com/file/d/0B8t988i8IfdSMzlTS3kzeC1Jd1k/