Fixes: NB#230586
Fixes: NB#230586

RevBy: Stanislav Ionascu
MergeRequest: 1444

Details: Unnecessary calls to navigationBarAnimation->takeContentSnapshot() were eliminated.
In case of nonanimated page transitions or if there is no pageswitch animation
snapshots are not taken.

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