Since PHP 8.4 implicitly nullable parameter types are deprecated.
Normalize scoped PHPDoc for nullable-parameter updates: use `?Type` instead of
`Type|null`, remove column alignment, and indent continuation lines with 2
spaces.
Co-authored-by: "Eric Lippmann <eric.lippmann@icinga.com>"
`hidden=true` also hides elements from screen readers.
`sr-only` is now fixed for chrome.
`aria-hidden` true has been added because it suits
and was previosly missing.
fixes#4411
