Improve the <title> of the pages

[rfc1036]

Usability: I changed resources/views/layouts/ixpv4.foil.php like this:

        <title>
            <?= config('identity.sitename' ) ?>
            -
            <?php $this->section('page-header-preamble') ?>
            <?php $this->stop() ?>
        </title>

This way all pages have a specific title so they can be found in the browser search bar.