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

{% macro form(action='', class=none, id=none, method="post", use_csrf_token=true) %}
    <form method="{{method}}" action="{{action}}" {{ {'id': id, 'class': class}|xmlattr }} {{kwargs|xmlattr}} >
        {% if csrf_token is defined and use_csrf_token %}
            <input type="hidden" name="csrf_token" value="{{csrf_token}}">
        {% endif %}
        {{ caller() }}
    </form>
{% endmacro %}