tdf#144668: docx export: simpler way to create lvlText in numberings
Oldr approach with populating ListLabelString with some predefined
values and than replacing them by placeholders is not so good. It
can lead to collisions if we use numbers in format string.
Anow with support of list strings in core we do not need this: it
is enougth to replace LO placeholders %1%, %2%, ... by MS binary
placeholders \0, \1, ...
Additionally added support for list level initialization in DOC
import: that case was still setting just prefix/suffix leaving
list level uninitialized.
Change-Id: Ia85551f46b4e229dea93c663459ec1a8715c8a23
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/124326
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>