Error during undo operation

[hasanbalci]

If there is a collapsed node in the graph and we call collapseAll function, then undo operation throws error. It can be produced in undoable demo.

[hasanbalci]

The bug is also valid for collapseRecursively function. If there are two nested compound nodes and the one inside the other is collapsed, then if we either call collapseAll function or collapseRecursively function on the outer compound node, undo operation throws error.

[ugurdogrusoz]

@hasanbalci please leave a comment here on how we plan to fix this in a future release and unassign yourself.

[hasanbalci]

The bug may be fixed by providing an option to the expandRecursively and collapseRecursively functions to control the level that the recursion will continue or the nodes that will be affected.

[hasanbalci]

I think this was automatically closed long before, so I am opening it again.