"Docs" link at Navbar renders as `<span>` causing unexpected behavior.

[rober-m]

All links in Navbar are rendered as <button>, but the "Docs" link is rendered as <span>. This means it doesn't work as expected (the others do):

• You can't open a new tab with a secondary click.
• You can't focus on it using Vimium.

I believe this is unintended.

Here's the relevant line that causes this.