Regression from 046df0a8

Use the fix for tdf#105998 only when 'selection' option is checked
in the save dialog

Change-Id: I8c4127c780736408e905ead48e0d3ee6ae149197
Reviewed-on: https://gerrit.libreoffice.org/73391Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>
Tested-by: Xisco Faulí <xiscofauli@libreoffice.org>