[LyX/master] UserGuide: use new features for all index entries

[Juergen Spitzmueller]

commit 262f0b528a48c6b1bcf17ce10769d99c6f30e50a
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Tue Nov 1 11:06:50 2022 +0100

    UserGuide: use new features for all index entries

 lib/doc/UserGuide.lyx | 3207 ++++++++++++++++++++++++++++++++++++++++++-------
 1 files changed, 2770 insertions(+), 437 deletions(-)