<select multiple> is exposed as a listbox, not a combobox

[aleventhal]

At https://open-ui.org/components/select#use-with-assistive-technology the a11y information is only correct for <select size="1">

See https://www.w3.org/TR/html-aam-1.0/#details-id-112
A <select multiple> is exposed differently, e.g. as a listbox.

In addition, since a <select> stands on its own and includes <optgroup> and <option> elements, it is important to consider how those are exposed as well.

But, before we worry about a11y mappings we need to talk about
#113
If we implement that, we may need to prototype changes to how options are exposed, and/or work with screen reader vendors, so that it's clear to uses the option works like a checkbox, and space can toggle.

[github-actions]

There hasn't been any discussion on this issue for a while, so we're marking it as stale. If you choose to kick off the discussion again, we'll remove the 'stale' label.

[aleventhal]

+Nicole Sullivan ***@***.***>

…

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[github-actions]

There hasn't been any discussion on this issue for a while, so we're marking it as stale. If you choose to kick off the discussion again, we'll remove the 'stale' label.