Integrate N-Dimension selector again.

After major DataType change, the N-Dim selector became incompatible.
We should use it for:

• TimeSeries visualizers
• Brain Visualizer

Analyzers do not seem to need it, so Bogdan proses to implement this on visualizer level (double select).

Marmaduke sais that MODE will be integer, without any need of textual description.
But State-Variables will need a naming, so a new attribute on TimeSeries is needed, with these labels (can be obtained from the Model class).