2010-07-04  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* src/sheet-control-gui.c (scg_objects_drag_commit): simplify slightly
	(scg_drag_receive_same_process): pass the correct argument to
	  scg_objects_drag_commit
	* src/sheet-object.c (sheet_object_set_sheet): don't complain if the oject
	  is already set to this sheet.
	* src/commands.c (CMD_OBJECTS_MOVE): delete
	(cmd_objects_move_*): delete
	(cmd_objects_move): rewrite using GOUndo