Bug 24866: Display budget hierarchy in the budget dropdown menu used when placing...

Bug 24866: Display budget hierarchy in the budget dropdown menu used when placing a new order

The rendering of SELECT elements is up to the browser.
But Bug 16123 CSS code 'style="padding-left: xx' doesn't work on modern browsers.

This patch replace CSS style attribute with   html entity.

On supported platforms
TEST PLAN :

1. Go to the Administration module
2. Add a new budget (ie : Budget 2020)
3. Add a fund to this budget (ie : Book)
4. Add a sub-fund to fund Book (ie : Adult fiction)

You will have this hierarchy :

Budget 2020
 |____ 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

OR

Book
   Adult fiction

AFTER PATCH
Book
   Adult fiction

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>