Classnames for outer/inner containers

[jacob-s-son]

Hello. Thank you for this great package. Unfortunately the way we style our components is not compatible with what this package provides out of the box (we rely on CSS and SASS variables heavily).

We figured out how we can override (delete) some of the enforced styles, but we needed the additional class names. Hence, we forked the repo and added them:
ScoutRFP@7db1d00

If you are interested in this patch, I can invest some time to come up with a PR.