Send cancel request checkbox is tightly coupled to the ability to cancel recurring contributions- but probably shouldn't be
The checkbox is shown because of
if ($this->_paymentProcessorObj->supports('cancelRecurring')) {
$params['send_cancel_request'] = 1;
}
However for many, perhaps most recurring subscriptions the checkbox is inappropriate as we are just changing the value in the contribution_recur table. We should be able to toggle those separately....
@mattwire add a new supportsNotifyGatewayOfRecurringChanges ?