Resolve "Style checkboxes"
This adds some hooks for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28622 to style as well as adding a help
text slot for form checkboxes.
All to make the checkbox match the spec
Blocked by: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28622
Related: #259 (closed)
Edited by Sam Bigelow