fix: Various NavMobile and NavJumpMenu fixes for EDU

[stephiescastle]

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Description

Fixes regressions (some introduced in #656):

• https://github.com/nasa-jpl/www/issues/700
• https://github.com/nasa-jpl/www/issues/702
• https://github.com/nasa-jpl/www/issues/704

Changes:

• sets overflow-x to hidden on "Section" divs within the EDU Lesson template and EDU Student Project templates
• adds back hidden class to NavJumpMenu at smaller screen sizes
• wraps Education in BaseLink in NavMobile

Instructions to test

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge

[Scotchester]

The horizontal overflow is fixed, but I'm still not seeing the on-page jump menu.

[Scotchester]

Note to update #660 for this after it's merged.

[stephiescastle]

The horizontal overflow is fixed, but I'm still not seeing the on-page jump menu.

It's not intended to be visible on mobile. It's part of the mobile navigation. Would be nice to have it be visible but decided to wait on that as it's a bit more involved and not original spec.

[Scotchester]

The horizontal overflow is fixed, but I'm still not seeing the on-page jump menu.

It's not intended to be visible on mobile. It's part of the mobile navigation. Would be nice to have it be visible but decided to wait on that as it's a bit more involved and not original spec.

Ahhh, thanks for clarifying.