Add flag to Converter Setup

It would be fine to have a flag, that enables the converter to search for report files in all subdirectories with mentioned filter settings (except error/done).

Background:

We often have Test Equipment which stores report results in a specific subdirectory (for instance as *.csv reports) connected to a specific part number. Instead of running an executable by script or as a scheduled task it might be more useful to enable sub directory scan by setting a single flag in client converter setup.