move the code which can do this from sw to vcl

Change-Id: I9940fb80ecdbfe8f70afc500c691288ed0993701
Reviewed-on: https://gerrit.libreoffice.org/40925Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>