title: Jquery ui - sortable: drag by icon 'handle' within sortable element
body: <p>I have jquery ui sortables working fine but my sortable elements have other interactive elements within them. In order to prevent accidental sorting when interacting with the elements within the sortable divs, I'd like to somehow make the dragging movement for the sortables only occur when dragging a certain element within the sortable, such as a 'move' icon that might reside in the top left corner of each sortable. Is this possible with generic jqui, or would I need to write my own hook?</p>