Remove item move animation on view resize

Remove item move animation on view resize

This commit removes an animation that happens when the view is
resized. Before this commit, whenever the geometry of the view
changed, the items in the view drifted towards their new position
in the layout after a 300 ms delay. It would look like the items
are slow to find their position.

This commit simply moves them to their new position in an instant
which will abort any ongoing move animations.