basis.dragdrop: calc MoveableElement's element bounding rect relative to offsetParent
basis.dragdrop: calc MoveableElement's element bounding rect relative to offsetParent

fateevv/basisjs,istrel/basisjs,smelukov/basisjs,basisjs/basisjs,tyanas/basisjs,fateevv/basisjs,tyanas/basisjs,smelukov/basisjs,tyanas/basisjs,fateevv/basisjs,basisjs/basisjs,istrel/basisjs,smelukov/basisjs,istrel/basisjs,basisjs/basisjs