A two-way relation between CurrentItem and SelectedItem when the ItemsSource is ICollectionView.

Dangalov: This feature will be recieved automatically when replacing ListBox with RadListBox.

My FindFullMatchIndex method returns -1 when an item is not found. Instead of selecting no items and leaving the scroll position where it's at like the default search text behavior; the combobox scrolls the list to the top and selects the first item in the list.