Switch to side-by-side view

--- a/.hgignore
+++ b/.hgignore
@@ -92,5 +92,6 @@
 website/idxthreads/forkingRecoll.html
 website/idxthreads/xapDocCopyCrash.html
 website/pages/recoll-mingw.html
+website/pages/recoll-webui-install-wsgi.html
 website/pages/recoll-windows.html
 src/doc/user/RCL.SEARCH.SYNONYMS.html