weseek__growi/src/server/views/layout-growi/widget/header.html

<div id="grw-subnav" class="grw-subnav d-edit-none" data-is-forbidden-page="{{ forbidden }}"></div>

{% if not page and not forbidden and ('/' === path or 'crowi' === getConfig('crowi', 'customize:behavior')) and not isUserPageList(path) and !isTrashPage() %}
  {% if '/' === path.slice(-1) %}
    {% include '../../widget/create_portal.html' %}
  {% endif %}
{% endif %}