Widget: Stop setting ui-state-disabled and aria by default on setting disabled option.
Fixes #5973 - Resizable: disabled should not have the ui-state-disabled class or aria attribute aria-disabled
Fixes #5974 - Draggable: disabled should not have the ui-state-disabled class or aria attribute aria-disabled
Fixes #6039 - Droppable: disabled should not have ui-state-disabled

This reverts commit 23771d38ba9d2663f6db0243c8e992dc7ff6844a.