Switch to side-by-side view

--- a/src/desktop/unity-lens-recoll/data/recoll.lens.in
+++ b/src/desktop/unity-lens-recoll/data/recoll.lens.in
@@ -2,7 +2,7 @@
 DBusName=org.recoll.UnityLensRecoll.Lens
 DBusPath=/org/recoll/unitylensrecoll/lens
 Name=Recoll Lens
-Icon=@DATADIR@/unity-lens-recoll/recoll-lens.svg
+Icon=@DATADIR@/unity-lens-recoll/recollbg24.png
 Description=Search documents indexed by Recoll
 SearchHint=Type to search
 Shortcut=a