BUGFIX: Add can* permission checks otherwise users who have access to the event are unable to add tickets for that event
BUGFIX: Add can* permission checks otherwise users who have access to the event are unable to add tickets for that event

souldigital/silverstripe-eventmanagement,registripe/registripe-core,silverstripe-australia/silverstripe-eventmanagement,souldigital/silverstripe-eventmanagement,stephenmcm/silverstripe-eventmanagement,burnbright/silverstripe-eventmanagement,silverstripe-australia/silverstripe-eventmanagement,burnbright/silverstripe-eventmanagement,stephenmcm/silverstripe-eventmanagement