Bug 11914: fix two issues when creating an order from a suggestion

Bug 11914: fix two issues when creating an order from a suggestion

When order is being created from purchase suggestion:
- Budget/fund stored in suggestion record (if any) is not retained
on order page, system always defaults to 'Select a fund' even if some
fund was already chosen for a suggestion on the earlier stage.
- If there was a price given to, and stored within suggestion record,
initial prices calculations on order page are not working properly
('Replacement cost', 'Budgeted cost' and 'Total' show as 0.00 or blank).
As a workaround - to force correct price recalculation - user needs
to manually alter and then re-alter some price-related fields (e.g.,
quantity or vendor price).

This patch fixes both issues.

Test plan:
1) create a suggestion: choose some buget, enter something in 'Price'
and 'Quantity' fields,
2) try to make an order from this suggestion, to confirm/replicate
aforementioned problems,
3) apply patch,
4) make an order from previously created suggestion again, observe
that both issues are now resolved.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works as described, passes all tests and QA script.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 1b0c02376e772a6ad9d45e01bcbac106ee534c92)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>