spec for making sure links are removed when a node is removed + undo
spec for making sure links are removed when a node is removed + undo

mindmup/mapjs,bhargav175/mapjs,pyxis777/mapjs,pyxis777/mapjs,AbdulMuhsinSE/mapjs,danielrasmuson/mapjs,bhargav175/mapjs,mindmup/mapjs,AbdulMuhsinSE/mapjs,danielrasmuson/mapjs,pyxis777/mapjs,bhargav175/mapjs,AbdulMuhsinSE/mapjs,danielrasmuson/mapjs