Fast deleting items throws error on mouseUpEvent

[Tovape]

Found this yesterday and fixed by adding a if not null case in the switch (line 46811 I presume)
switch(state) {
case states.DRAGGING:
if (selectedObject !== null) {
selectedObject.clickReleased();
} else {
switchState(states.SELECTED);
}
switchState(states.SELECTED);
break;