old icon moon, to align the statistics icon in course list view
hints on how the controller should take care about the waiting flat for the loading or not of the statistics view among the transition between views
first draft workaround on Issue #215
fixed Issue #223 (=loading of courses list view while being logged out)
changed the  isLoginState test towards using the 'loginState' property instead of the ' userAuthenticationKey' property in order to represent the state of the user interaction.