This event is fired when row selection is changed (after the default action, which is selecting/unselecting the row in the UI).
- args.row (DayPilot.Row object)
- args.selected (true if the row has just been selected; false if it has been unselected)
- args.ctrl (true if Ctrl key is pressed)
- args.shift (true if Shift key is pressed)
- args.meda (true if Meta key is pressed)