[Win8] StartDesignTime() is not executed in designer

[EisenbergEffect]

StartDesignTime() logic is not executed in designer.
see https://caliburnmicro.codeplex.com/discussions/463911 for details

[nigel-sampson]

In most scenarios initialization of the CaliburnApplication is initiated by the call to DisplayRootView or DisplayRootViewFor inside OnLaunched which isn't called at Design Time.

Calling Initialize in the constructor of your App.xaml correctly calls StartDesignTime.

public App()
{
    InitializeComponent();

    base.Initialize();
}

[tibel]

There should be some documentation describing the design time experience on WinRT.