revert...

commit 7ec12ce7
Author: Caolán McNamara <caolanm@redhat.com>
Date:   Fri Sep 28 20:24:35 2018 +0100

    weld SwMailConfigDlg

the contained page needs to be converted first

Change-Id: I9788132b0ad11cec853be7339be1829386794511
Reviewed-on: https://gerrit.libreoffice.org/66784Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>
Tested-by: Xisco Faulí <xiscofauli@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>