Bug: 4263 - Repeatable subfields in items

Bug: 4263 - Repeatable subfields in items

Squashed commit of the following:

commit f441094d5095d165eab18340c983a831cce8f6e0
Author: Henri-Damien LAURENT <henridamien.laurent@biblibre.com>
Date:   Mon Jul 5 20:33:23 2010 +0200

    bug4263 followup : Can't blank subfields

    Previous bug4263 reintroduced bug 2466: fix clearing item field
    This keeps bug4263 followup to be assigned (donot blank dateaccessioned)
    But also allow to blank item subfields.

commit 92889b766c41b48bdd0e3a33ca4b183b1e259805
Author: Nahuel ANGELINETTI <nahuel.angelinetti@biblibre.com>
Date:   Fri Apr 23 13:54:30 2010 +0200

    (bug #4263) dateaccessionned is cleaned on item modification

    Every item modification, date accessionned is cleaned, if there is no modification made, we must'nt reset to "undef" the value.

commit 5abb2db16b2564d32e84b7cc680acbc301d73179
Author: Nahuel ANGELINETTI <nahuel.angelinetti@biblibre.com>
Date:   Tue Mar 2 09:57:33 2010 +0100

    (bug #4263) fix the edition of items with repeatable subfields

    The subfield management in item level is broken, fields are concatenated in one field, and if the librarian edit it, the values are not selected.
    This big patch fix three things:
     1) saving fields that are stocked in SQL(using koha2marc mapping) are now well cut and separated in _REAL_ subfields
     2) loading records with repeatable subfields are now well returned
     3) Editing items with repeatable fields works well

Signed-off-by: Chris Nighswonger <cnighswonger@foundations.edu>
Bug 4263 Removing extranious block of code
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
(cherry picked from commit aa398ed055a7226ba02d6559b297cb172b3ce3df)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>