call: group call design: Design for group call (which is used for both group call and A/V conferences) has been improved to: - have a working fullscreen button; - have a better display of peer users in grid, with responsive design; - have a nicer design for peer user, and adding avatar/nickname as overlay on the bottom of the video stream; - add a way to (un)pin a peer user, which make is appear on the whole width on top of the grid. rel 448 HG<S-Insert>: changed sat_templates/templates/bulma/call/group_peer.html

{% import 'components/avatar.html' as avatar with context %}

<div class="reacting-users-list">
    {% for jid in reacting_jids %}
        <div class="reacting-user-item is-flex is-align-items-center mb-2">
            {{ avatar.avatar(jid, "is-24x24") }}
            <span class="reacting-user-nickname ml-2">
                {{ identities[jid].nicknames[0] if identities[jid].nicknames else jid }}
            </span>
        </div>
    {% endfor %}
</div>