Bug 7237 - duplicating patron not using patron's branch

Bug 7237 - duplicating patron not using patron's branch

When duplicating a patron the original patron's library should be
preselected.

To test, apply the patch and choose a patron to duplicate, noting which
library is set as their home library. Click the "Duplicate" button and
cnofirm that the patron's library is preselected on the patron entry
form.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works as described, no problems found.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>