Bug 23863: Editing a basket clears create_items value

Bug 23863: Editing a basket clears create_items value

Test Plan:
1) Create a basket with a non-default value for aqbasket.create_items
2) Click Edit from basket.pl
3) Click Save without changing anything
4) Note that aqbasket.create_items is no longer set
5) Apply this patch
6) Restart all the things!
7) Repeat steps 1-3
8) Note create_items is unchanged!

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 2f315139e213ca9241d385dfea0aa747999c8464)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>