Language argument doesn't passed to hooks from dialogs/areas

[afbora]

Description

When you try to update the model title from dialogs in multi language setup, $languageCode returns null always. I don't remember when it's broken but I think this is a regression.

return [    
    'hooks' => [
        'site.changeTitle:before' => function (Kirby\Cms\Site $site, string $title, ?string $languageCode = null) {
             // language code returns null
        },
        'page.changeTitle:before' => function (Kirby\Cms\Page $page, string $title, ?string $languageCode = null) {
            // language code returns null
        }
    ]
];

Your setup

Kirby Version
3.9.10 & 4.0.2