Bug 35742: Fix removal of added user from fund

Bug 35742: Fix removal of added user from fund

On the fund edition page, if a new user is added the "Remove" link does
not remove the user.

Test plan:
0. Do not apply this patch
1. Edit a fund
2. Click "Add users"
3. Search for patron and add some users
   => Notice that the "Remove" link does not remove the user
4. Apply this patch and repat 1, 2, 3
   => Notice that the "Remove" link remove the user

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>