Switch to side-by-side view

--- a/src/python/recoll/recoll/conftree.py
+++ b/src/python/recoll/recoll/conftree.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # Copyright (C) 2016 J.F.Dockes
 #   This program is free software; you can redistribute it and/or modify
 #   it under the terms of the GNU General Public License as published by