Add pages for ‘service settings’ flow

Adds the pages and wires them together, so that it’s possible to click
through them.

The wording is not quite English, but attempts to be an rough description of
what the consequences are for each of the four actions.

app/templates/components/browse-list.html

@@ -0,0 +1,20 @@
+{% macro browse_list(items) %}
+  {% if items %}
+    <nav class="browse-list">
+      <ul>
+        {% for item in items %}
+          {% if item.title and item.link %}
+            <li class="browse-list-item">
+              <a href="{{ item.link }}" class="browse-list-link{% if item.destructive %}-destructive{% endif %}">{{ item.title }}</a>
+              {% if item.hint %}
+                <div class="browse-list-hint">
+                  {{ item.hint }}
+                </div>
+              {% endif %}
+            </li>
+          {% endif %}
+        {% endfor %}
+      </ul>
+    </nav>
+  {% endif %}
+{% endmacro %}