Bug 4277: Display the correct budget planning after saving

Bug 4277: Display the correct budget planning after saving

The budget_period_id is not pass to the script, so after saving the
budget planning, the planning for the first active budget is displayed.

Test plan:
1/ Edit a budget planning
2/ Save
3/ You should see the budget planning you were editing

Patch behaves as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>