Bug 33040: Add "Date published (text)" to serials tab on record view (detail.pl)

Bug 33040: Add "Date published (text)" to serials tab on record view (detail.pl)

Some libraries would like to see the "Date published (text)" in the serials tab on the "Normal" record view ( aka catalogue/detail.pl ).

Test Plan:
1) View the serials tab on detail.pl for a subscription where the latest
   serial has a "Date published (text)" field populated.
2) Apply this patch
3) Restart all the thigns!
4) Browse to detail.pl for that record
5) View the Subscriptions tab
6) Note the "Date published (text)" column exists now!

Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>