[REVIEW-3-6] fix for fdo#54555, set the cond format range during xls import

[Markus Mohrhard]

Hey,

[1] fixes a problem with cond format import from xls. With the patch
we set the range correctly so that the conditional format is correctly
updated and exported again. Import works also without this code but
during export and updating we need the information.

Regards,
Markus

[1] http://cgit.freedesktop.org/libreoffice/core/commit/?id=880773208305b15b521df58245367bc3001d2ce1