HttpBaseProtocolFilter also supports IInitializeWithWindow (#3712)

Author: oldnewthing

hub/apps/develop/ui-input/display-ui-objects.md

@@ -45,6 +45,7 @@ These classes implement [**IInitializeWithWindow**](/windows/win32/api/shobjidl_
 * [**Windows.UI.Popups.MessageDialog**](/uwp/api/windows.ui.popups.messagedialog). But for new apps we recommend using the [**ContentDialog**](/uwp/api/windows.ui.xaml.controls.contentdialog) control instead.
 * [**Windows.UI.Popups.PopupMenu**](/uwp/api/windows.ui.popups.popupmenu)
 * [**Windows.UI.StartScreen.SecondaryTile**](/uwp/api/windows.ui.startscreen.secondarytile)
+* [**Windows.Web.Http.Filters.HttpBaseProtocolFilter**](/uwp/api/windows.web.http.filters.httpbaseprotocolfilter)
 
 > [!NOTE]
 > The list above is necessarily incomplete—refer to a type's documentation to see whether it implements **IInitializeWithWindow** (or an equivalent interop interface).