LP#1942220: (follow-up) tweak LI expand/hide behavior

LP#1942220: (follow-up) tweak LI expand/hide behavior

- Expand/collapse at the individual LI level no longer expands
  only one line item at a time; user can exapnd or collapse as
  many as they see fit
- when navigating between pages of LIs, the current state of
  the expand/collapse all button controls whether the page of
  LIs are show as expanded or collapsed

Signed-off-by: Galen Charlton <gmc@equinoxOLI.org>