OMEdit: Interactive simulations fail if buildModel gives warnings

[Martin Sjölund]

You need to check the return-value of buildModel... getErrorString may contain warnings or notifications. Now any model that returns a warning is not able to be interactively simulated

bool OMCProxy::buildModel(QString modelName, QString simualtionParameters)
{
    sendCommand("buildModel(" + modelName + "," + simualtionParameters + ")");

    if (getErrorString().isEmpty())
        return true;
    else
        return false;
}