[v3.0.0-alpha] Clear tasks on transfer list not working

[de-es]

Deleting all upload tasks on the transfer list is not working. If you click OK on the "Are you sure you want to delete records" modal, nothing happens except a toast message "Upload canceled".

Deleting single tasks works.

Deleting all tasks on the download list works as well.

[zhwanng]

Thanks for your feedback

[de-es]

Bug still present in 3.0.2-pre.