Bug 19469: Add ability to split view of holds view on record by pickup library and...

Bug 19469: Add ability to split view of holds view on record by pickup library and/or itemtype

It is possible to set up circulation rules to limit trapping of holds by pickup library and itemtype.
To make it easier to understand which holds will be trapped in a given circumstance,
it would be nice if we could optionally group holds by pickup library and/or itemtype.

Test Plan:
1) Apply this patch set
2) Run updatedatabase.pl
3) Enable AllowHoldItemTypeSelection
4) Pick a record and create holds with various pickup libraries and itemtype combinations
5) Enable HoldsSplitQueueNumbering
6) Try the different combinations of HoldsSplitQueue
7) Ensure the hold "arrows" move the items correctly
   * Up and down arrows should move hold above or below the adjacent hold within a hold fieldset
   * Top and borrom arrows should move hold to the top or bottom within a hold fieldset

Sponsored-by: Stockholm University Library
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Followed test plan, patch worked as described. Also passed QA test tool

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Andreas Hedström Mace <andreas.hedstrom.mace@sub.su.se>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>