Fixes#757. Note: Because we are getting this info from the session, the redirect may not happen until the page is rendered first in cases where the connection is slow, or the db is slow.
It appears that the `required` field is not applied in the way we'd like it to be for the custom checkbox group and custom phone input fields, so do a `required` check on form submission. Additionally, this adds in a few style fixes. Fixes#695, #694, #693, #691
From review of the style with @carljbowman
Requires a bit of magic, where the Form component manually adds the "all" value. But without a major overhaul of the validation system, I don't see how else to put the general error among the other fields.
/cc @carljbowman
One issue we ran into is that our `frameless` configuration is in `em` rather than `rem`, making it difficult to have an aboslute grid applied uniformly at all hierarchies. For now, we're using straight `rem` calculations instead of `$cols{1,8}` in the styling until we can refactor `frameless` to use `em`.
