Merge branch 'fix/bo-wiki-overview-query' into 'develop'

Add prefetch_related to WikiOverviewView

See merge request hub/hub!1076

src/backoffice/views/wiki.py

@@ -65,7 +65,7 @@ class WikiOverviewView(WikiAdminMixin, TemplateView):
 
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
-        ctx['last_edits'] = StaticPageRevision.objects.filter(page__conference=self.conference).order_by('-timestamp')
+        ctx['last_edits'] = StaticPageRevision.objects.filter(page__conference=self.conference).prefetch_related('page', 'author').order_by('-timestamp')
         return ctx