Bug 35745: Fix 'Set suggester' of a suggestion

Bug 35745: Fix 'Set suggester' of a suggestion

On the suggestion edit form, if a suggester is selected using the "Set
to patron" (and patron search), the details of the selected patron will
contained "undefined" for the library's name and patron's category
description.

Test plan:
Edit a suggestion, click "Set to patron", select a patron
Notice that with this patch the library's name and patron category is
correctly displayed.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit f7171c0a6c61769719afcd0d5e70d1aad3d2a27b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>