fdo#78159: fix import of OOoXML embedded objects

MimeConfigurationHelper::GetDefaultFilterFromServiceName() checks that
there is both an import and an export filter, and for OOoXML the export
has been removed; tweak the check to require only import for OOoXML.

Currently it still works invoke the OOoXML filter, but it is clearly
better to store the embedded documents only in ODF, so tweak
OCommonEmbeddedObject::store* methods to do that.

(regression from aeeaccf59abbc485d7786486f1accc1cb4d4dbf7)

Change-Id: Ib71f23fd110cbd4b570517f2dde2c53e3aa6301d
fdo#55582 Writer: Dont overwrite from even when selected, from writer.

This patch fixes the writer part, calc part is fixed long ago.
Problem: it overwrites when you paste from impress or calc.
This allows to keep the graphic's frame,
so the text doesn't have to be rearranged.
(i.e. it is desired, so I didn't change that)
I was trying to give the user a choice,
but I didn't succeed in keeping the frame when pasting from writer to writer.
coming soon!

Change-Id: I07271df9bb501779d06f332bb13edd05f0aefacb
Signed-off-by: Lennard Wasserthal <Wasserthal@nefkom.net>