CHANGELOG

2016-04-02: rewriten
2016-07-26: fix for emty optional_columns
2016-08-22: removed index column
2017-04-07: changed wato for enable/disable H/W invetory
          : changed remove columns
2017-04-20: fixed empty removecolumns list from params
2017-05-29: fixed empty pid handling
2020-08-04: moved node tree from hardeware.system.modules to hardware.hw-modules
            some cleanup
2020-03-15: added support for CMK1.6x