Log Message:
kitemmodels: update to 5.70.0

5.68
  KRearrangeColumnsProxyModel: temporarily disable assert due to QTreeView bug
  KRearrangeColumnsProxyModel: reset in setSourceColumns()
  Move Plasma's SortFilterProxyModel into KItemModel's QML plugin
5.69
  [KSortFilterProxyModel QML] Make invalidateFilter public