Droppable: Defer querying of offsetWidth and offsetHeight until they're required. Fixes #9339 - Droppable: offsetWidth and offsetHeight are queried unnecessarily causing synchronous reflow.
Droppable: Defer querying of offsetWidth and offsetHeight until they're required. Fixes #9339 - Droppable: offsetWidth and offsetHeight are queried unnecessarily causing synchronous reflow.

GrayYoung/jQuery.UI.Extension,GrayYoung/jQuery.UI.Extension