fix(dovecot): set mailbox_list_layout to fs

mailbox_list_layout = fs must appear explicitly in the config file even
though it's the default value used according to https://doc.dovecot.org/2.4.1/core/config/mail_location.html#mailbox_list_layout

If not set the folders will appear as .Drafts .Junk .Sent .Trash in the user's Mail directory instead of Drafts Junk Sent and Trash.

emailwiz.sh

@@ -242,6 +242,9 @@ passdb pam {
   driver = pam
 }
 
+# Our mail for each user will be in ~/Mail, and the inbox will be ~/Mail/Inbox
+# The LAYOUT option is also important because otherwise, the boxes will be \`.Sent\` instead of \`Sent\`.
+mailbox_list_layout = fs
 mail_driver = maildir
 mail_path = ~/Mail
 mail_inbox_path = ~/Mail/Inbox