[Templates] VS 17.14 Preview 3 C# template missing file-scoped namespace changes

[michael-hawker]

@haonanttt I just downloaded VS 17.14 Preview 3, I see some of the template changes, but not all of them. The file-scoped namespaces for instance aren't there...? But I see them in main.

Originally posted by @michael-hawker in #4911 (comment)

Seems somehow that only part of a PR made it into a release, I'm pretty confused...

It properly appears in main here:

WindowsAppSDK/dev/VSIX/ProjectTemplates/Desktop/CSharp/SingleProjectPackagedApp/MainWindow.xaml.cs

Lines 19 to 30 in 8a64027

	namespace $safeprojectname$;
	/// <summary>
	/// An empty window that can be used on its own or navigated to within a Frame.
	/// </summary>
	public sealed partial class MainWindow : Window
	{
	public MainWindow()
	{
	InitializeComponent();
	}
	}

But in VS creating a new project I see this still:

Note the partial is there still, and I see the other XAML changes and removal of button... it's odd, why isn't this reflecting the code in the repo?

(Also the aka.ms/winui-project-info link I think needs an update as is trying to point somewhere that I think has changed in the docs?)