v2.10.0

Added

• Add link to back office in Django admin topbar
• Add boolean field has_waived_withdrawal_right to the Order model
• Add is_withdrawable to CourseProductRelation model
• Prevent a user to create an order for a product without withdrawal period
  if the user has not waived his withdrawal right
• Display has_waived_withdrawal_right in back office Order view
• Add dark theme to back office

Changed

• Ignore archived course runs to process payment schedule and withdrawable state