Updates TreeListBoxItem UI automation peers to support the ExpandCollapse pattern.
Features
- Updated TreeListBoxItem UI automation peers to support the ExpandCollapse pattern.
- Updated some item adapter logic to not execute if there is a null TreeListBox.RootItem.
- Updated focus handling code to not move focus when various TreeListView item updates occur while focus is within a column header.
Fixes
- Fixed a bug where the TreeListBox.SelectionChanged event could get raised twice.
- Fixed a bug where the TreeListBoxItem.OnPointerPressed method could throw an exception.
- Fixed a UI bug in a certain scenario where a TreeListBox data item's children were populated as it was expanded.