OnObjectSelected delegate is not called when object is selected through the World Outliner

When using the USelection::SelectObjectEvent delegate, selecting an object directly in the viewport will call the delegate as expected but selecting the object through the World Outliner does not call it.

1. Open attached project
2. Select green cube in the viewport
   • Notice the capsule component that appears
3. Deselect cube
4. Select GreenCube in the World Outliner

Result:
Capsule component does not appear when selecting through the World Outliner

Expected:
SelectObjectEvent is called when object is selected regardless of selection method