Bug 16123 - Display budget hierarchy in the budget dropdown menu used when placing...

Bug 16123 - Display budget hierarchy in the budget dropdown menu used when placing a new order

When placing a new order, the budget dropdown will display the budget hierarchy.

TEST PLAN :

1. Go to the Administration module
2. Add a new budget (ie : Budget 2016)
3. Add a fund to this budget (ie : Book)
4. Add a child fund (ie : Adult fiction)

You will have this hierarchy :

Budget 2016
 |____ Book
         |_____ Adult fiction

5. Go to the Acquisition module
6. Select a vendor and create a new basket
7. Place an order
8. Check the budget dropdown menu

BEFORE PATCH
Book
Adult fiction

AFTER PATCH
Book
   Adult fiction

Dropbown menu is hierarchical as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Nicolas Legrand <nicolas.legrand@bulac.fr>
Signed-off-by: Katrin Fischer  <katrin.fischer@bsz-bw.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>