[accessibility] The search component isn't keyboard operable

[Malvoz]

It's not possible to use the component using only a keyboard. The design pattern that the search component is using is an established pattern of the WAI-ARIA Authoring Practices, called listbox (effectively custom <datalist>).

They also provide an example component that is fully accessible, here: https://www.w3.org/TR/wai-aria-practices/examples/listbox/listbox-collapsible.html

---

Potentially helpful resources:

• Leaflet guide to accessibility: Test your maps
• Leaflet Plugin Authoring Guide: Content Accessibility