Bug 9788: Improvements when calling GetReservesFromItemnumber

Bug 9788: Improvements when calling GetReservesFromItemnumber

This patch makes GetReservesFromItemnumber also returns the waiting
date and removes some repeated code.

Improves item status display on catalogue detail, when placing a hold at
opac-reserve and in staff, and on transfers to receive form.

This patch builds on work from reports 9367 and 9761.

Test plan:

Place a future next-av. hold (enable future holds prefs), say 2 days ahead.
Check item status on catalogue detail. Nothing to see.
Enable ConfirmFutureHolds by inserting a number of days, say 2.
Confirm earlier hold by checking it in. Look at item status again on detail.
Switch to other opac user. Try to place a hold again. Check item status with
item level hold info. Try to place hold in staff, check item level status.
Make a transfer for that item. Switch branch. Look at transfers to receive.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>