Bug 13020 - Checkouts table default ordering is incorrect

Bug 13020 - Checkouts table default ordering is incorrect

The checkouts table is no longer keeping "today's checkouts" in the
order they were scanned.

Test Plan:
1) Create 3 records "Test 1", "Test 2" and "Test 3" each with one item
2) Check out the items to a patron in the order "Test 2", "Test 1", "Test 3".
3) Note the order is incorrect.
4) Apply this patch
5) Refresh the page
6) Note the order is now correct

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Note that the bug already exists before bug 12550. I checked on a 3.14.x
branch (without the ajax circ stuff), and the order is the same as with
this patch.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>