Bug 8224 - Make authorized values appear in planning list

Bug 8224 - Make authorized values appear in planning list

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
I can confirm the bugs on current master and this patch fixes both problems.

- Pull down list for "Planning" on the budget page was not showing
  categories of authorized values
- Planning page showed the categories, but budget_period_id was
  missing from the URL

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>