Added the "Store Name" property to the Scenario view.

The StoreName makes referente to the data table that should be used by the Forecast service during the simulation. Moreover, other elements of the Scenario view, such as the 'simulator' and the 'node', were removed.

Warn: The edition of a Scenario is buggy. This view only shows one item.
Bug fixed the edition mode of the ScenarioView.

Now it shows the fields corresponding to all the editable properties.