Bug 21262: Do not format numbers for editing if too big

Bug 21262: Do not format numbers for editing if too big

This patch copies the code from bug 15770 to the format_for_editing
sub.

It also corrects schema issue, listing the purpose for two acq columns
instead of claing unused

To test:
1 - Edit a fund
2 - Set warning at amount to: 100000000000000
3 - Save budget
4 - Try to edit - internal server error
5 - Apply patch
6 - Should be able to edit budget
7 - Number should appear unformatted

Signed-off-by: Christopher Brannon <cbrannon@cdalibrary.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
2 quick notes:
1. Code must be moved to a subroutine if reused later
2. It would have prefered to have the comment of the 2 DB columns on a separate patch
(even separate bug report). As it's minor and that the patch will certainly backported
I will not block it.

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>