** Fixed materials page locale in Illusion events 
** Added null-check into IllusionEventPageController
** Fixed bug that caused logged in non participants to see Illusion
event without any pages
** Fixed bug that caused Illusion event custom page to result in access
denied when it should have asked for login
** Fixed page title of Illusion event pages management
** Fixed ui tests
** Changed event+key to be unique in IllusionEventSetting entity