and reweld SwMailConfigDlg

Change-Id: Icf7497db0cd2e9097752414eb11498c694723646
Reviewed-on: https://gerrit.libreoffice.org/66787
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>