issue with display names

[fbergmann]

A bug at biosimulators mentions, that basico does not resolve display names with nested parenthesis:

biosimulators/Biosimulators_COPASI#74

[fbergmann]

as it turns out, CDataModel::findObjectByDisplayName does not return a flux reference in those cases. This needs to be fixed in the main COPASI repo, until then I can add a workaround to basico.