Bug 15752: Automatically switch to patron when cardnumber is read during circulation

Bug 15752: Automatically switch to patron when cardnumber is read during circulation

With this syspref enabled scanning a patron barcode into the item
barcode field during circulation will redirect you to the patron's
circulation page.

This allows circulation with only a barcode scanner.

Testing:

- Enable the AutoSwitchPatron syspref
- Navigate to a patron's check out screen
- Enter a patron barcode into the "Enter item barcode" field

Result
- Browser should be redirected to the entered patron

Signed-off-by: Joel <aloi54@live.fr>
Followed test plan, patch works as described
Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>