title: Enable network simulation doesn't work for query IsNetworkAvailable
body: <p>I'm trying to find out in my app is there network available using Tools/Simulation Dashboard in Visual Studio 2012 for WP 8 app (of course, debug mode is on).
  Whatever I do I got for DeviceNetworkInformation.IsNetworkAvailable always true although I set Control setting to No Network. But if I try some activity in app that need network access I can't do that (so it works but withoud detection which is my primary goal).
  Are they any thing to do to get False to my query and to do i.e. Message Box that says "No Network available".</p>
  
  <p>Also, 
  DeviceNetworkInformation.CellularMobileOperator
  always return Fake GSM Network" with No Network setting set to. When I change setting I got "Simulation setting were applied succesfully" in VS status bar.</p>
  
  <p><img src="https://i.stack.imgur.com/3pXvm.jpg" alt="simulation dashboard"></p>