[LyX/master] de/Additional: revisions, #2.

[Juergen Spitzmueller]

commit 6abef2737d0b21bf65384af5954e61d6b6ef5be7
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Mon Jan 16 17:13:48 2023 +0100

    de/Additional: revisions, #2.

 lib/doc/de/Additional.lyx | 2545 ++++++++++++++++++++++++++++++++++++++++++++-
 lib/doc/de/UserGuide.lyx  |  970 -----------------
 2 files changed, 2544 insertions(+), 971 deletions(-)