Bug 14265 - Use $.trim instead of trim() in admin/categorie.tt

Bug 14265 - Use $.trim instead of trim() in admin/categorie.tt

This patch replaces trim() with $.trim() in admin/categorie.tt, as
$.trim() is more cross-platform (ie it is supported in "< IE9").

_TEST PLAN_

Before applying patch:

0) Use IE 8 or use Document Mode 8 in a newer IE using F12 Developer Tools
1) Go to Administration > Patron categories
2) Click "Edit" next to a category
3) Click "Save" at the bottom
4) Note the form doesn't submit (you can also notice the error in the
console log)

Apply the patch:

5) Hold down shift + refresh the page
6) Click "Save" at the bottom"
7) Note that the form does submit and there are no errors reported

Signed-off-by: Indranil Das Gupta <indradg@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@koha-community.org>
No regression found using iceweasel.
I did not know the staff interface was IE compatible.
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit 06ef68046e52a56f690e656f30592ff46b21a383)