add ctrl-l for open, as default ctrl-o is set to discard in shell

Index: share/mutt-wizard.muttrc
--- share/mutt-wizard.muttrc.orig
+++ share/mutt-wizard.muttrc
@@ -109,6 +109,7 @@ set sidebar_format = '%D%?F? [%F]?%* %?N?%N/? %?S?%S?'
 bind index,pager \Ck sidebar-prev
 bind index,pager \Cj sidebar-next
 bind index,pager \Co sidebar-open
+bind index,pager \Cl sidebar-open
 bind index,pager \Cp sidebar-prev-new
 bind index,pager \Cn sidebar-next-new
 bind index,pager B sidebar-toggle-visible