Change logic around to be clearer

Think this is a clearer expression of what the intent it.

app/main/views/jobs.py

@@ -285,7 +285,7 @@ def get_notifications(service_id, message_type, status_override=None):
             limit_days=service_data_retention_days,
             prev_page=prev_page,
             next_page=next_page,
-            more_than_can_be_shown=(next_page and search_term),
+            show_pagination=(not search_term),
             status=request.args.get('status'),
             message_type=message_type,
             download_link=download_link,