Items not sorting sequentially

[bbusenius]

Fixes issue #134. Bugzilla 26359

Changes in this request

• Sorting by copy number / enumeration for items on the full record page.
• Order is reversed for serials (as was the case in our old implementation)

Test record (compare to production)

https://dldc2.lib.uchicago.edu/vufind/Record/1625207