elementary: reduce event trigger during object creation stage in Efl.Ui.CollectionView.
Once the object are created, the CollectionView will do a few modifiction on them before
giving this object to the position manager to deal with. Reducing events should slightly
Reviewed-by: SangHyeon Jade Lee <firstname.lastname@example.org>
Reviewed-by: Marcel Hollerbach <email@example.com>
Differential Revision: https://phab.enlightenment.org/D10686