Stopping a workflow that is currently copying a directory channel won't stop (immediately)

[ArneBachmann]

The input provider with the directory output variable has a grayed out stop symbol for one more minute until stopping (marked failed).

[yocaba]

Reported in main issue tracker for proper scheduling. Resolution will be reported back as soon as available.

Link to issue: hhttps://mantis.sc.dlr.de/view.php?id=15133