home: get sounds ordered by creation time, not diffusion time (#1125)

panikweb/views.py

@@ -431,7 +431,7 @@ class Home(TemplateView):
                     where=['''datetime = (SELECT MIN(datetime)
                                             FROM emissions_diffusion
                                         WHERE episode_id = emissions_episode.id)'''],
-                    tables=['emissions_diffusion'],).order_by('-first_diffusion').distinct() [:3]
+                    tables=['emissions_diffusion'],).order_by('-creation_timestamp').distinct() [:3]
 
         context['newsletter_form'] = SubscribeForm()