gnucash maint: Readd the fix for the date/amount sorting for import main matcher

[Robert Fewell]

Updated	 via  https://github.com/Gnucash/gnucash/commit/0a1a28be (commit)
	from  https://github.com/Gnucash/gnucash/commit/520f350a (commit)



commit 0a1a28be16209d96b6b3857de6b0fc4153c3e890
Author: Robert Fewell <14uBobIT at gmail.com>
Date:   Fri Jun 7 16:47:22 2019 +0100

    Readd the fix for the date/amount sorting for import main matcher



Summary of changes:
 gnucash/import-export/import-main-matcher.c | 72 +++++++++++++++++++++++------
 1 file changed, 57 insertions(+), 15 deletions(-)