letsencrypt: Use app.html instead of simple_app.html

- Produce a diagnostics button using app.html code instead of a custom button.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/letsencrypt/templates/letsencrypt.html

@@ -1,4 +1,4 @@
-{% extends "simple_app.html" %}
+{% extends "app.html" %}
 {% comment %}
 #
 # This file is part of FreedomBox.
@@ -127,8 +127,6 @@
       </tbody>
     </table>
 
-    {% include "diagnostics_button.html" with module="letsencrypt" enabled=True %}
-
   {% else %}
     {% url 'config:index' as config_url %}
     {% blocktrans trimmed %}

plinth/modules/letsencrypt/views.py

@@ -39,9 +39,12 @@ def index(request):
     return TemplateResponse(
         request, 'letsencrypt.html', {
             'title': letsencrypt.name,
+            'name': letsencrypt.name,
             'description': letsencrypt.description,
             'status': status,
             'manual_page': letsencrypt.manual_page,
+            'diagnostics_module_name': 'letsencrypt',
+            'is_enabled': letsencrypt.app.is_enabled(),
         })