Bug 14388: Funds should be sorted by budget_code

Bug 14388: Funds should be sorted by budget_code

Before this patch, the funds were sorted by budget_id, which does not
make any sense.

This patch adds a sort by budget_code on the fund list (acqui/acqui-home.pl and
admin/aqbudgets.pl)

Test plan:
On both pages (acqui/acqui-home.pl and admin/aqbudgets.pl) confirm that
the funds are now sorted by fund code (DB column budget_code)

Signed-off-by: Nicole Engard <nengard@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>