Patch Changes

• #5902  - Allow middle-mouse viewport panning to start from a selection rectangle.
• #5889  - Fix extent: parent not immediately resolving when parent has width or initialWidth.
• #5943  - Invoke an error if handle can not be found
• #5947  - Use correct nodeExtent for internal setNodes.
• #5918  - Fix selection box appearing when dragging the pane via touch. Prefer touch panning over drag selection when selectionOnDrag is combined with mouse-button-specific panOnDrag settings.
• #5922  - Allow Control to activate pane panning with a primary-button drag.
• #5929  for useKeyPress.
• #5938  - Fix <Background /> pattern offset miscalculation.