gnucash maint: Fix missing 'Business Linked Documents' menu action.

[Robert Fewell]

Updated	 via  https://github.com/Gnucash/gnucash/commit/4afbbe13 (commit)
	from  https://github.com/Gnucash/gnucash/commit/ea9eaa96 (commit)



commit 4afbbe1348d1e6251b1eabeed02c753243e84415
Author: Robert Fewell <14uBobIT at gmail.com>
Date:   Sun Oct 4 12:11:46 2020 +0100

    Fix missing 'Business Linked Documents' menu action.



Summary of changes:
 gnucash/gnome/gnc-plugin-business.c     | 2 +-
 gnucash/gnome/gnc-plugin-page-invoice.c | 5 ++---
 gnucash/ui/gnc-plugin-business-ui.xml   | 2 +-
 3 files changed, 4 insertions(+), 5 deletions(-)