Bug 18439 - Resend button for notices being hidden by CSS and never unhidden

Bug 18439 - Resend button for notices being hidden by CSS and never unhidden

Current jQuery is not unhiding resend button, this patch adds an id
and a toggle command

To test:
1 - Enable EnhancedMessagingPreferences
2 - Find a patron with sent or failed messages
3 - Note you can expand message, but not resend
4 - Apply patch
5 - Note that on expanding message a 'Resend' button appears
6 - Ensure resend button operates as expected

Works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Lari Taskula <lari.taskula@jns.fi>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Mason James <mtj@kohaaloha.com>