This way the fields are easier to use, and we can get rid of the
placeholders.
Note we're simplifying the `answer_result_value` in order to make it
easier to return `0` instead of `nil` when the field is empty.
Also note there's a small change of behavior here; previously, these
fields were empty by default, and now their value is `0` by default, so
blindly clicking the "Save" button would send `0` instead of an empty
value. I don't think it's a big deal, though, but we need to keep that
in mind.
This way we can move some system tests to component tests and stop
creating records after starting the browser with a `visit`.
We could also split the system test in two, but since these tests
aren't checking any user interactions, moving the to component tests we
check the same things while making the tests faster.
Since the partial was using an instance variable, we're passing it to
the component. We're naming it `voter_user` instead of `user` because
passing something named `user` could make us think that we're passing
the `current_user`. I wasn't sure about naming it `voter` because it's a
`User` record and not a `Poll::Voter` record, but naming it `voter`
would definitely be an option.
