Resolves: i124477 set object shadow always at PPT import...

it may be applied to object text

(cherry picked from commit 5fb2c24bd0cfc0b911aa2d0389960c5ee3d14c4a)

Conflicts:
	filter/source/msfilter/msdffimp.cxx

Change-Id: I8b93ff85333078d3e79cc9aa1002f232214a5be1