Currently PX does not allow for widget-level filters on Query Builder report widgets on the Dashboard:
Because of this, it is currently an arduous task to edit the date range visible on this widget as you have to go into the Query Builder report, edit the date range and save, then come back to the widget and see the updated data. This almost entirely defeats the point of the Query Builder report being visible on a Dashboard Widget, as the need to change date ranges is something that happens frequently.