[Accessibility] Broken keyboard navigation on demo page

[GaloisGirl]

Navigating by tab on the demo page, I get directed to:

1. The first "..." (good)
2. download (good)
3. github (good)
4. demo (good)
5. <a href="#project">, an element invisible on the screen (bad)

More info on why this is important:

1. https://accessibility.digital.gov/ux/tab-order/
2. https://www.w3.org/TR/UNDERSTANDING-WCAG20/content-structure-separation-sequence.html

This, along with #73 , makes it hard to evaluate whether the plugin is accessible.

[lemonmade]

Hi @GaloisGirl. You're totally right, and I appreciate you pointing this out. My work on this plugin was fro much earlier in my web career when I didn't understand almost any accessibility best practices. Unfortunately, this plugin is effectively abandoned, as I just don't have time to make any meaningful updates.