Reduce the number of modules by merging simplified and complex models for the same object

The model complexity could then be choosen while in the parameters panel.

changed milestone to %ThermoSysPro v5.0

added Modeli UX/UI labels

For instance reheaters with 1pipe/3pipes. It should be tested to activate or not (be careful with the use of cardinality for activation or not, as it should not be used anymore)

mentioned in merge request !14