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
2021-05-02: rewrite for CMK 2.0
2023-06-03: moved gui files to ~/local/lib/chek_mk/gui/plugins/...
2023-06-14: moved wato file to check_parameters sub directory
            removed declare_invtable_view from view definition on cmk 2.2 (see werk 15493)
            changed inventory_displayhints import (see werk 15493)