Bug 26953: Hide phone and itiva from "Overdue notice/status triggers"

Bug 26953: Hide phone and itiva from "Overdue notice/status triggers"

If the prefs are off we should not display the checkboxes

Test plan:
1. Turn off PhoneNotification and TalkingTechItivaPhoneNotification
2. Go to the "Overdue notice/status triggers" and confirm that phone and
itiva columns are not displayed
3. Turn the prefs on and confirm the checkboxes are now displayed

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>