Merge branch 'check_synchronization_data_listener' into 'master'

doc/tutorials/notebooks/workflow_operation.ipynb

orangecontrib/tomwer/widgets/control/DataTransfertOW.py

tomwer/core/process/control/scantransfer.py

tomwer/core/process/test/test_dark_and_flat.py

tomwer/core/process/test/test_data_listener.py

tomwer/core/process/test/test_data_transfer.py

tomwer/core/process/test/test_data_watcher.py

tomwer/core/process/test/test_pyhst_caller.py

tomwer/io/utils/__init__.py

tomwer/io/utils/utils.py

tomwer/synctools/datatransfert.py

tomwer/synctools/test/test_foldertransfer.py

tomwer/test/test_ewoks/test_workflows.py