model.Component: dynamically adding data props to a model that got defined without data

an edge case for sure.

we should use the constructor to assign an empty object to this.data.

E.g.:

    addDataProperty(key, value) {
        let me = this,
            data, scope;

        Neo.ns(key, true, me.data);

        data  = me.getDataScope(key);
        scope = data.scope;

        scope[data.key] = value;

        me.createDataProperties(me.data, 'data');
    }

The Neo.ns() call would not work in case data is undefined.