"autogenerate_appliance_from_sold_product". This enables a specific feature: a product can be marked with a check box "Is appliance". Whenever such an item is sold, an Appliance (in the Assignments module) gets automatically created. On the invoice row, there is a link to the created appliance."report_generator_max_multiselect_items". This adjusts the threshold (number of records) at which the report generator starts displaying a filter as a regular text field, instead of a multi-select dropdown with all the options listed.