List: Only highlight when drags start on list
List: Only highlight when drags start on list

Don't allow drag selections to start outside
of the list, as that can lead to segmented
selections.

holmwell/circle-blvd,myersg86/circle-blvd,holmwell/circle-blvd,myersg86/circle-blvd,myersg86/circle-blvd,secret-project/circle-blvd,holmwell/circle-blvd,ellipsonic/circle-blvd,secret-project/circle-blvd,secret-project/circle-blvd,ellipsonic/circle-blvd,myersg86/circle-blvd,ellipsonic/circle-blvd,secret-project/circle-blvd,holmwell/circle-blvd,ellipsonic/circle-blvd