Bug 33549: Fix dialog box in patron restrictions

Bug 33549: Fix dialog box in patron restrictions

To test:
1. Enable PatronRestrictionTypes
2. Go to Administration > Patron restrictions
3. Click 'New restriction'
4. Enter a code and label
5. Click 'Save'
   --> 'Type added' at the top of the page is not styled
6. Apply patch
7. Try again, dialog is styled correctly

Signed-off-by: Sally <sally.healey@cheshiresharedservices.gov.uk>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 28735b8ff31536febee4315407ce46a3ff063268)
Signed-off-by: Jacob O'Mara <jacobomara901@gmail.com>