separate translations for Spacing: vs Margins:
separate translations for Inch vs cm

Change-Id: I9a2d8fe3ad0edde5afefe00258f1309f898130e8
Reviewed-on: https://gerrit.libreoffice.org/62699
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>