The withnav_template can serve as a replacement for both settings_template and org_template.html.
The file service_navigation.html is included only in withnav_template. It's not used in settings_template. That is one out of the two differences between settings template and withnav template. As a result, when other templates extend settings_template, they include the serviceNavigation block but keep it empty. The settings_template.html is specifically used for these pages in the app: manage-users.html, service-settings.html, and user-profile.html.
In addition, serviceNavigation should be empty on templates that previously extended org_template. For templates that previously extended org_template.html, there's an addition of the orgNavBreadcrumb block.
{% block orgNavBreadcrumb %}
{% include "/new/components/org_nav_breadcrumb.html" %}
{% endblock %}
#}
{% if current_org.name %}
{% block orgNavBreadcrumb %}{% include "/new/components/org_nav_breadcrumb.html" %}{% endblock %}
{% endif %}
<divclass="grid-row margin-top-5">
<divclass="tablet:grid-col-3">
{% block sideNavigation %}
{% if current_org.name %}
{% include "/new/components/org_nav.html" %}
{% else %}
{% include "/new/components/main_nav.html" %}
{% endif %}
{#
Include settings_nav.html for child templates that previously extended settings_template.
Include "org_nav.html" for child templates that previously extended org_template html