LP1889128 Reset hold recipient info after success

LP1889128 Reset hold recipient info after success

* When all holds for a given recipient have been successfully placed,
directly or via override, clear the recipient data so new recipient data
can easily be added.

* When placing duplicate Part holds, ensure the same part is applied to
each hold context so the selected part is targeted for all of the
multi-holds.

* Fxes a regression in the display of multiple hold targets where only
the first target would display.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Michele Morgan <mmorgan@noblenet.org>