Fixed a bug in connecting column to level: if the relationship was dropped on the level header, we would get a runtime exception. Now, dropping on the header of the level behaves as if it was dropped on the key column of te level (i.e. it sets the column attribute of the Level element).
Fixed a bug in connecting column to level: if the relationship was dropped on the level header, we would get a runtime exception. Now, dropping on the header of the level behaves as if it was dropped on the key column of te level (i.e. it sets the column attribute of the Level element).

rpbouman/phase,rpbouman/phase,rpbouman/phase