Defines the auto-scrolling behavior during drag-and-drop. When enbaled, the first scrollable container going from the TreeView and up will be scrolled when the dragged item reaches the top of that container or its bottom.
(default: true) Controlls whether scrolling is enabled.
(default: 1) Specifies the interval (in milliseconds) in which the scrolling will be performed.
(default: 1) Specifies the step (in pixels) by which the scrolling will be performed.