tdf#86787: Page style margin limited to 99.99mm
tdf#86787: Page style margin limited to 99.99mm

Normailizes MarginEdit before assigning values to SetMax and SetLast

Change-Id: I2aa1eca75c36e8dd4ac5905b49d6802b5c763f85
Reviewed-on: https://gerrit.libreoffice.org/14821
Tested-by: Jenkins <5a4fe08359c7f97380e408c717ef42c86939cd86@libreoffice.org>
Reviewed-by: Caolán McNamara <301f5784f9f6aac04077f24f1e5abc31af69d401@redhat.com>
Tested-by: Caolán McNamara <301f5784f9f6aac04077f24f1e5abc31af69d401@redhat.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core