gnucash-docs maint: In Business Account Setup of A/R and A/P emphase 'for each currency'

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/2e426e4f (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/93566dc4 (commit)



commit 2e426e4fdea7568e233b33cab3d9ae2740308251
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Tue Feb 18 04:40:19 2020 +0100

    In Business Account Setup of A/R and A/P emphase 'for each currency'
    
    * Additionally the wiki link and some whitespace was fixed,
    * the german translation got a few corrections,
    * untranslated sections in other languages got a few updates from the
    english version



Summary of changes:
 guide/C/ch_bus_features.xml  |  17 +-
 guide/de/ch_bus_setup.xml    |  32 +--
 guide/it/gnucash-guide.xml   | 582 ++++++++++++++++++++++++++-----------------
 guide/pt/ch_bus_setup.xml    | 325 ++++++++++++++++--------
 guide/ru/ch_bus_features.xml | 518 ++++++++++++++++++++++++--------------
 5 files changed, 918 insertions(+), 556 deletions(-)