Can not cancel upload onBeforeUploadItem.

Canceling uploads in the 'onBeforeUpload' callback method still sends the request:

$scope.uploader.onBeforeUploadItem = function (item) {
    item.cancel();
}

Trying other FileItem methods produces same result:

$scope.uploader.onBeforeUploadItem = function (item) {
    item.remove();
}

...removes file from queue, but still sends the request.
