Replace buttons by tab component

[mfranzke]

          Just a passing suggestion (maybe not something to implement here in this PR, but just a thought).

I would maybe suggest using an accessible UI foundation package for the editor (which is essentially a Tabs component, I think?). There are quite a few keyboard interactions (e.g. roving focus) that are a bit tricky to get right when rolling your own.

For comparison's sake, here are a few that I know of, off the top of my head:

• https://react-spectrum.adobe.com/react-aria/useTabList.html
• https://reach.tech/tabs
• https://reakit.io/docs/tab/
• https://www.radix-ui.com/docs/primitives/components/tabs

Originally posted by @melanieseltzer in #341 (comment)

[melanieseltzer]

Thanks for opening this and surfacing my suggestion @mfranzke 👍

@pomber I would be happy to help work on implementation if you are open to it.

[stern-shawn]

+1 for this!