start with cursor in search box

[jsta]

This PR makes it so when you navigate to the page with the search box, your cursor starts in the box ready to go.

[vsoch]

This is a great idea! Quick question, what is the difference between:

<input autofocus="autofocus"></input>

(in this PR) vs what I see here

<input autofocus></input>

[jsta]

Possibly nothing? At least no difference I see in practice either way. I'll revise to be more canonical.

[vsoch]

This LGTM - one nit might be to still be consistent with spacing, but it doesn't change functionality of the site.

Let's wait for another reviewer that is actively maintaining the site.

Thanks for this @jsta!