JANRAIN-1611. Enforce white text on modal headers
- Bootstrap uses an H3 for the title content in their modal template. We are enforcing that
the text of that H3 is white when a modal header is "danger", "alert" or "info"
Merge pull request #27 from janrain/roby/master/JANRAIN-1611/correct-modal-header-title-color

JANRAIN-1611. Enforce white text on modal headers