1st part of bnc#870233: wrong list style in shapes

Text list styles were copied, without proper
copy constructor and operator. It lad to mix
up list styles and so text font.

(cherry picked from commit 31650d5b4255c484faec11d570cb98a80f0120cc)

Conflicts:
	sd/qa/unit/import-tests.cxx

Change-Id: Iee7a6c0c1f74322fd7b80e41a262849f948e463a
Reviewed-on: https://gerrit.libreoffice.org/9661
Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>