Adds 'Close Tab Group' menu item to tabbed MDI document tab context menus.
Features
- Added 'Close Tab Group' menu item to tabbed MDI document tab context menus.
- Updated floating dock hosts to support layout serialization of minimized window states.
- Improved target size logic of the DockingWindow.MoveToNewHorizontalContainer and MoveToNewVerticalContainer methods.
- Updated UIA peers for docking window tabs to provide access to embedded buttons.
Fixes
- Fixed a focus bug that could occur when there was a floating document without any other documents in the primary dock host.
