BZ7677: New areas in subscriptions and new functions when receiving.

BZ7677: New areas in subscriptions and new functions when receiving.

When enabling the makePreviousSerialAvailable syspref, the previously
 received serial's itemtype is set as defined in the subscription.
 (Please note that the item-level_itypes syspref must be set to specific item.)
 It is also made available.

Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
http://bugs.koha-community.org/show_bug.cgi?id=7767

Signed-off-by: Katrin Fischer  <katrin.fischer@bsz-bw.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>