Node properties dialog cannot be opened after doing a CEA

[Francisco Javier Díez]

After doing a CEA on this ID http://www.probmodelxml.org/networks/id/ID-CEA-test-2therapies.pgmx, it is not possible to open the node properties dialog for any node. When closing the network, OpenMarkov says that it has been modified. Apparently the CEA algorithm modifies the original ID instead of cloning it before doing the analysis.