'NSNoUnderlineStyle' & ‘NSSingleUnderlineStyle’: Deprecated in OS X 10.9

Change-Id: If18df0c06a1bdec5ea54307f9c452a1edf533e15
Reviewed-on: https://gerrit.libreoffice.org/9740
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>