<p>The currently focused item is stored in a call to FrameworkElement.SaveUIState when a screen closes and is then restored when navigating back to that screen with a call to FrameworkElement.RestoreUIState.&nbsp;However when a dialog is shown, the underlying screen loses focus, so no longer has a&nbsp;focused element, if the dialog then&nbsp;by pushes&nbsp;a new&nbsp;WorkflowNavigationContext, sometimes focus is not restored to the screen before the call to SaveUIState and hence there is no focused element&nbsp;to save and restore.</p>

<p>We should try and detect this case and save and restore&nbsp;the element that had focus before the dialog was shown.</p>