Revert "Remove signed_out template variable"

This reverts commit 8a59743746.

app/templates/admin_template.html

@@ -147,11 +147,15 @@
     {% set meta_suffix = 'Built by the <a href="https://www.gov.uk/government/organisations/government-digital-service" class="govuk-footer__link">Government Digital Service</a>' %}
   {% endif %}
 
-  {% if current_user.is_authenticated %}
+  {% if signed_out %}
     {% set using_notify_links = {
       "title": "Using Notify",
       "columns": 1,
       "items": [
+        {
+          "href": url_for("main.get_started"),
+          "text": "Get started"
+        },
         {
           "href": url_for("main.trial_mode_new"),
           "text": "Trial mode"
@@ -171,10 +175,6 @@
       "title": "Using Notify",
       "columns": 1,
       "items": [
-        {
-          "href": url_for("main.get_started"),
-          "text": "Get started"
-        },
         {
           "href": url_for("main.trial_mode_new"),
           "text": "Trial mode"

app/templates/views/signedout.html

@@ -1,5 +1,7 @@
 {% extends "fullwidth_template.html" %}
 
+{% set signed_out = True %}
+
 {% block meta %}
   <meta name="description" content="GOV.UK Notify lets you send emails, text messages and letters to your users. Try it now if you work in central government, a local authority, or the NHS.">
 {% endblock %}