pwa: only add navigation markup when entries are defined (#29427)

combo/apps/pwa/templates/combo/pwa/navigation.html

@@ -1,4 +1,5 @@
 {% load combo %}
+{% if entries|length %}
 <div class="pwa-navigation" id="pwa-navigation">
 <div>
 <ul>
@@ -35,3 +36,4 @@ $('body.authenticated-user li[data-notification-count-url]').each(function(idx,
   }});
 });
 </script>
+{% endif %}

combo/apps/pwa/templatetags/pwa.py

@@ -28,7 +28,7 @@ def pwa_navigation(context):
         return ''
     pwa_navigation_template = template.loader.get_template('combo/pwa/navigation.html')
     context = {
-        'entries': PwaNavigationEntry.objects.all(),
+        'entries': list(PwaNavigationEntry.objects.all()),
         'user': context.get('user'),
         'render_skeleton': context.get('render_skeleton'),
         'site_base': context['request'].build_absolute_uri('/')[:-1],