Map view is functional

* NavigateTo appends a parameter so the system can navigate to a
different view hosted in HostPage
* StationMapVM is a Conductor<>.AllActive and manages the ActiveItem
separately
* enabled Landscape orientation in all views except the main one
* Selected station details are displayed in an info bar at the top of
the view
~ there's a problem when navigating back from Station view to Maps view
where all the items are activated!