When hitting enter in a form, the first "input[type=submit]" or "button" is clicked.  We have to make sure the input[type=submit] is the first input element.

Conflicts:
	browserid/static/dialog/controllers/dialog_controller.js

Cleanup.

This is to simplify code and help with i18n.

This helps get these strings out of the logic and to prepare for i18n.