Comment 1 for bug 2039483

I have added the subheadings, along with the necessary CSS to avoid major visual changes to font size, weight, line height, and whitespace.

Branch here:
https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/sleary/LP2039483-staffcat-subheadings

To test, you can either use a screen reader's page navigation tools or a browser extension that simulates the landmarks and headings list; I use SkipTo Landmarks and Navigation (screenshot attached).

Previously, only 1) Staff Catalog appeared in the headings list. It is now:

1) Staff Catalog
  2) Record Summary
    3) Staff View
    3) Item Table
    3) MARC Edit
    3) MARC View
    3) Record Notes
    3) View Holds
    3) Monograph Parts
    3) Holdings View
    3) Conjoined Items
    3) Shelf Browse
      4) FIC 220 @ BR4
      4) FIC 220 @ BM1
      4) [etc.]

Does it make sense to user a lower heading level for everything after Record Summary, or should I move Staff View, etc. up to the same level?