(related: fdo#78502) writerfilter: RTF import: fix invalid string copy

... in leveltext destination.

Change-Id: I74de6d14170130bf33923854a0c9851dc7cc390f
fdo#78502: writerfilter: RTF import: handle \u keyword inside levelnumbers

The ";" terminates an entry and shall not be inserted as text,
even if some over-engineered producer encodes it as {\uc1 \u59 ?}.

Also, remove the special-casing of the \leveltext destination, since the
bugdoc does contain \uc inside it and it's not obvious why that should
be ignored.

Change-Id: I1e19c9df39597cb1b22bbda97853c829d7812e29
writerfilter: RTF import: ignore \listname destination differently

This adds a skeleton for \listname but not immediately obvious what it
should do...

Change-Id: Icd8dd3b5d597f1c4038044ec2eba8b63718e0d3d