chat: Add forward, rich editing and extra recipients: - There is a new "forward" menu in message. For now, a simple prompt ask for recipient JID. - A new "extra" menu is available next to input field. Inside there are 2 items for now: add extra recipient, and toggle rich edit mode. - Extra recipient option add a field to add an email-like "to", "cc" or "bcc" recipients. - Rich edit let use rich styling such as bold, italic, underline, etc. rel 461

<ul>
    {% for edition in editions %}
        <li class="m-2">
            <span class="tag is-info is-light">
                {{ edition.timestamp | date_fmt(fmt="auto_day", auto_new_fmt="relative") }}
            </span>
            <span class="ml-2">{{ edition.text }}</span>
        </li>
    {% endfor %}
</ul>