Contributors dashboard MVP & Unit testing

Ensure the Contributors dashboard & its UI components follow the MVP (Model View Presenter) pattern in order to ensure a clear separation between "the view", "the presenter" and "the model".
In such model, The presenter must not contain any widget reference and the model must not "touch" the view as well. The presenter must provide the required logic to pass & update the view with the required information. MVP applicability ensures the logic in the presenter can be properly tested using junit/mockito tests.