Bug 34083: Add searching for full term on patron auto-complete

Bug 34083: Add searching for full term on patron auto-complete

To reproduce, on k-t-d:
1) Create a new patron of category 'School'
2) Enter 'Middle school high school' on the mandatory 'Name' field and put something in 'Card number:'
3) Visit patron lists at /cgi-bin/koha/patron_lists/lists.pl and click 'New patron list'
4) Put something in 'Name:' and click 'Save'
5) On the 'Patron search' input, enter 'middle school high school' slowly and observe the auto-complete behaviour
6) Notice how after you start typing the second word, the auto complete results vanish.
7) Apply patch, repeat plan and verify it now works as expected.

Signed-off-by: Sam Lau <samalau@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>