Fixes: The grid page crashes when orientation change event comes before the content is created.
Fixes: The grid page crashes when orientation change event comes before the content is created.

RevBy: Daniel d'Andrada
Details: The grid page was crashing due to recent behavior change in scene manager.

nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch