Issue #3273222 by vnech: Make changes for node--event--full template BC

{% block nodefull_specialfields %}

  <div class="article__special-fields">

    {#

    @todo: Leave only the event_date_advanced variable for

      Open Social 11.4.x and above.

      @see https://github.com/goalgorilla/open_social/pull/2853

    #}

    {% if event_date_advanced is defined %}

      {{ event_date_advanced }}

    {% else %}

      <div class="article__special-field">

        <svg class="article__special-fields-icon" aria-hidden="true">

          <title>{% trans %} Event date {% endtrans %}</title>

          <use xlink:href="#icon-event"></use>

        </svg>

        <span class="sr-only">{% trans %}Event date {% endtrans %}</span>

        <span class="inline-center">

          <strong>{{event_date}}</strong>

        </span>

      </div>

    {% endif %}

    {% if content.field_event_address|render or content.field_event_location|render %}

      {#

      @todo: Leave only the event_location_address variable for

        Open Social 11.4.x and above.

        @see https://github.com/goalgorilla/open_social/pull/2853

      #}

      {% if event_location_address is defined %}

        {{ event_location_address }}

      {% else %}

        <div class="article__special-field">

          <svg class="article__special-fields-icon" aria-hidden="true">

            <title>{% trans %} Located at: {% endtrans %}</title>

            <use xlink:href="#icon-location"></use></svg>

          <span class="sr-only">{% trans %}Event location {% endtrans %}</span>

          <span class="inline-center">

            <strong>{{content.field_event_location}}</strong>

            {% if content.field_event_address|render is not empty and content.field_event_location|render is not empty %} • {% endif %}

            {{content.field_event_address}}

          </span>

        </div>

      {% endif %}

    {% endif %}

  </div>