Bug 35069: Fix hold ratios items needed column sorting

Bug 35069: Fix hold ratios items needed column sorting

This patch adds the data-sort attribute to the "Items needed" column to
ensure proper sorting.

To test:
1. Make a lot of holds.
2. On some holds have a high enough holds/copies ratio so the "Items
   needed" has values greater than 10.
3. Sort by that column. Notice the copies with an "Items needed" higher
   than 10 do not get sorted correctly.
4. APPLY PATCH
5. Try steps 1 -3 again. Everything should sort properly.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 2ce68244991fc90b4606e1aa06e874c9854107a2)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>