TabView::Items() is no longer an IObservableVector, is now just an IVector #1021
Description
Describe the bug
In 1c4cbef (#971), TabView changed from being a ListView derivative to containing a ListView. The Items property changed from being an IObservableVector<IInspectable> to just being an IVector<IInspectable>.
This may not be a compatibility concern, but it does make it more difficult to observe the vector changing.
Expected behavior
The Items vector should be observable or TabView could expose an event indicating that the tabs have changed.
Version Info
NuGet package version:
Microsoft.UI.Xaml 2.2.190702001-prerelease