(bulma) CSS: fix content overflow in media object: Overflow was sometimes breaking design with media object. This was notably the case when viewing a list item with a long `<pre>` section, e.g. a ticket with a code pasted with long lines). This patch fixes it.

#body {
    display: flex;
    align-items: center;
    justify-content: center;
}

#link_section {
    font-weight: bold;
    text-align: center;
    font-size: 1.5rem;
}

article p:last-child {
    text-align: center;
}