Changed SheetItemFilter to use DenormalizedSheetItem as model
Changed SheetItemFilter to use DenormalizedSheetItem as model

pwalsh/openbudgets,pwalsh/openbudgets,shaib/openbudgets,moshe742/openbudgets,openbudgets/openbudgets,moshe742/openbudgets,openbudgets/openbudgets,shaib/openbudgets,pwalsh/openbudgets,openbudgets/openbudgets