Bug 35329: (follow-up) Label changes for improved accessibility

Bug 35329: (follow-up) Label changes for improved accessibility

This patch alters the patron search form so that <label>s wrap the
<input> fields, allowing the label to be clickable without having to
associate it with a unique id. CSS has been modified to accommodate this
change.

The patch also adds missing Bootstrap classes to the "Clear" button, and
swaps out the "hint" class for the "note" class on the permissions
information ("Only staff with superlibrarian or acquisitions
permissions...").

After this patch, form field labels in the patron search modal should be
clickable to give focus to the field (except for Sort 1 and Sort 2 --
label don't work that way with Select2).

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>