Bug Neos Ui crashes if no active site is found

[mhsdesign]

\Neos\Neos\Controller\Backend\MenuHelper::buildSiteList could return

array(1)
 'uri' (3) => 'http://localhost:8081/neos/content' (34)

Which throws an error attempting to fetch $site['name'] in

neos-ui/Classes/Infrastructure/Neos/MenuProvider.php

Line 78 in 26687fa

$name = $site['name'];

this is a regression since moving this to php, as having it in a fluid template (like Neos.Neos has to render the menu) is forgiving.

Since Neos 9.0