[REVIEW] fix for fdo#45481, undo does not work with text pasted from external tool to calc

[Markus Mohrhard]

Hey,

please cherrypick
http://cgit.freedesktop.org/libreoffice/core/commit/?id=73088aaaed3ad16f80405a3d87cea437d350b893
to 3-5.

It solves the problem that undo in calc can not remove pasted content
from an external program.

The patch just correctly sets the paste area to the ScMarkData used in
the ScUndoPaste.

Regards,
Markus