Running Cloud Sync tasks keep on running after deletion in GUI

Actual behaviour:

Currently running Cloud Sync tasks keep on runing when being deleted from the GUI.

This can result in duplicated space consumption when a second job is created afterwards.

This can result in potential conflicts in case after deletion a second task gets defined and triggered which points to the same destination.

Expected behaviour

When deleting a Cloud Sync task which is currently running it should be immediately stopped.

Alternatively, the system must not allow for deletion and responde to the user with a message that the job has to be stopped first. Stop option needs to be made available.