Changeset 17118

#2949: Fixed sorting in ItemCollectionView

• Sorting was broken in r17007:17008. It worked previously, because AutoResize probably put the control in a different mode (very likely that it incurred some painting). After removing AutoResize the control is now in a different mode where it doesn't actually sort the items. The items are now added in sorted order instead of inserting them in their given order and then sorting them in the view. This should be faster and have the same effect.