Bug 17780 - When choose an author in authority results new window shows a blank screen

Bug 17780 - When choose an author in authority results new window shows a blank screen

Select2 (Bug 13501) introduced divs and inputs that broke some assumptions about the expected HTML structure.
This patch checks if input has name attribute, because some inputs in Select2 have not.

To test:
Try to add info from the authorities to field that has subfield with Select2 (subfield with authorised values on Koha 16.11+)

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>