Bug 5680: Order cancelling improvement : delete attached items & biblio if avalaible

Bug 5680: Order cancelling improvement : delete attached items & biblio if avalaible

- all items attached to the order are deleted
- if there is no more items, and if the biblio is not in other orders and no subscriptions and no holds then the biblio is proposed to deletion
Now whe have 2 links : "delete order" and "delete order and catalog record", the second one appears only if the deletion is possible.
Note that if an hold is related to the item or if the item is unique for the biblio the link "Delete order" is canceled due to hold remaining.
On mouse over explanations are shown with count.
More lines of warnings with count are shown depending of the case.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Configuration:
AcqCreateItem = on order

Test cases and results:

1) Order new record with 2 items
a) From basket
- delete order: only deletes items, OK!
- delete order and catalog record: deletes record and items, OK
b) From shipment/receive
- delete order: only deletes items, OK!

2) Order 1 additional item for existing record with 1 item
a) From basket:
- delete order: works, existing item and record remain, OK
- Can't delete order and catalog record, 1 item left, OK!

3) Order new record with 1 item, title level hold on record
a) From basket:
- delete order: not possible, OK!
- delete orer and catalog record: not possible, OK!
b) From shipment/receive page
- Cancel: Deletes order, record and hold silently.
NO WARNING. NOT OK. See note below.

4) Order 1 additional item for existing record with 1 item,
item level hold on existing item
a) From basket:
- delete order: works, hold and existing item remain, OK!
- delete order and catalog record: not possible, OK!
b) From shipment/receive page
- Cancel: on order item is deleted, other item and hold remain.

5) Order new serial record, create subscription
a) From basket:
- delete order: works, record and subscription remain, OK!
- delete order and catalog record: not possible, OK!
b) From shipment/receive page:
- Cancel: Subscription and record are silently deleted. NOT OK.

6) Order additional item for existing record with other on order items
a) From basket:
- delete order: works, existing on order items remain, OK!
- delete order and catalog record: not possible, OK!
b) From shipment:
- Cancel: deletes order and ordered item. OK.

Changes made:
I changed the wording of the error messages a bit in the template.
I changed the message 'Can't delete order and catalog record' to not be
shown as a link, as the link does nothing. Tooltip still appears.
I attached a screenshot to the bug showing some of my changes.

Hope that's ok.

Necessary  enhancements:
Cancelling orders when receiving items should work the same as from the
basket summary page. We need the same checks and messages there before
deleting records and items automatically.
I am signing off on this, but to go into Koha it  needs a follow-up for the
order receive page.
Signed-off-by: Ian Walls <ian.walls@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>