Bug 38146: Display full datetime of datelastseen in item holdings

Bug 38146: Display full datetime of datelastseen in item holdings

To test:
1. Check in an item
2. Look at the item holdings table for the bib record that item is on
--> Note the date last seen column displays dates, but not the time
3. Apply patch and restart_all
4. Refresh the page
--> Date last seen column now shows the time you checked the item in

Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>