Description

closes #2758
test at http://localhost:3000/example.gdc.byssm.html. click a group of folded mutation. the individual expanded mutations are clickable
all mds3 tests pass

Checklist

Check each task that has been performed or verified to be not applicable.

• Tests: added and/or passed unit and integration tests, or N/A
• Todos: commented or documented, or N/A
• Notable Changes: updated release.txt, prefixed a commit message with "fix:" or "feat:", added to an internal tracking document, or N/A