gnucash-docs maint: Multiple changes pushed

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/6de20edc (commit)
	 via  https://github.com/Gnucash/gnucash-docs/commit/21304f7c (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/df352f7e (commit)



commit 6de20edc7ed9a00cdd8f4ea5882a1c3e55ca45c6
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Mon Jun 27 08:28:44 2022 +0200

    Manual: Minor structural cleanup of GUIMenus (C, de)

commit 21304f7c0157ec43123ec8ea82ecab15a5b59a59
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Mon Jun 27 07:04:04 2022 +0200

    gnc-dobookx.dtd: Mention predefined entities



Summary of changes:
 docbook/gnc-docbookx.dtd       |   4 +-
 manual/C/Help_ch_GUIMenus.xml  | 219 ++++++++++++++++++++---------------------
 manual/de/Help_ch_GUIMenus.xml |  42 ++++----
 3 files changed, 131 insertions(+), 134 deletions(-)