[TreeItem] Incompatible API change to TreeItem$TreeModificationEvent constructor

The fix for RT-38787 inadvertently removed a constructor with the following part of the change:

         public TreeModificationEvent(EventType<? extends Event> eventType,
- TreeItem<T> treeItem, List<? extends TreeItem<T>> added,
- List<? extends TreeItem<T>> removed) {
+ TreeItem<T> treeItem,
+ List<? extends TreeItem<T>> added,
+ List<? extends TreeItem<T>> removed,
+ ListChangeListener.Change<? extends TreeItem<T>> change) {

This is an incompatible API change.