... and others and double check for valid items on MouseMoved(). Bail out if drag item is invalid instead of deselecting. Make sure that the item is valid before deselecting it. Fixes #18707 #18716 Change-Id: Ic115f713f2aef7dfebafd23bc3107106b9128b8a Reviewed-on: https://review.haiku-os.org/c/haiku/+/7243 Reviewed-by: waddlesplash <[email protected]>