New filter of item main group added in multiple screens

To gain insight into information quickly, a filter of the item main group has been added in various screens. The filter has been added in the screens, ccPurchaseOrders, ccSalesOrders and ccAssignments, and can be found under the name "Main groups". With the help of this filter, information can be quickly made clear and it is possible to filter in these screens on one or more item main groups. Once in the filter, the item main groups can be typed as well as searched / selected via shortcut F3.