Feature/671 include richtext headings jump menu

[stephiescastle]

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Description

Addresses:

• https://github.com/nasa-jpl/www/issues/671

Changes:

• Adds two new utility functions: anchorizeBlock and anchorizeStreamfield
• Uses the new utils in nearly all EDU Resource templates to treat rich text headings as jump menu items
• Exceptions: Did not do this change for EDU Student Projects or EDU Galleries, as both of those templates have more strict definition of what the jump menu should be populated with (Step headings for the former, and Gallery item titles for the latter)

Instructions to test

View all EDU Resource templates. Check the jumpmenu for" Heading from richtext" (except on Galleries and Student Projects)

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge