Event roles inconsistencies

[ctizen]

• Added administrator can't cancel games or hands. Steps:
  • Create an event and start some games there
  • Add new administrator to event
  • From new administrator, try canceling round or game
  • Actual result: error "You don't have permissions"
  • Expected result: administrator can cancel games and hands
• Administrator can't add referee to event (while superadmin can do it). Unexpected error: "Permission denied"