Register instructions.organise as an owner-only editing surface

app/services/access.py

@@ -28,6 +28,7 @@ MANAGE_ON_GET = {
     'sets.edit_set',
     'sets.debug_set_image',
     'instructions.upload',
+    'instructions.organise',
     'instructions.debug_paths',
     'extra_files.upload',
 }