Unblock DataTable on Uno

[Martin1994]

This PR unblocks using DataTable on Uno with a Release build.

The top issue for now is the lack of ListView header in Uno: unoplatform/uno#1979, so this patch introduced a new container without use of a header to unblock its usage on Uno.

This approach is kinda hacky though, so I am looking for discussion about the long term direction assuming ListView's header won't be implemented in Uno soon.

Tested with WinUI 3 and Uno on Skia (WPF and GTK).

[Martin1994]

@dotnet-policy-service agree

[michael-hawker]

Thanks @Martin1994. But yeah, I was trying to explicitly not have an extra layer/type here and just use the natural container found in these scenarios. I believe the Uno folks are working on the issue though with ItemsPresenter? Maybe @MartinZikmund can give an update?

[Martin1994]

I believe the Uno folks are working on the issue though with ItemsPresenter?

That's great!

If header won't be a blocker, shall we take a look at the change at column resize handler?

// old
CurrentWidth = new(this.ActualWidth);
// new
CurrentWidth = new(this.Width);

When a manipulation event is sent on Uno, I don't see ActualWidth being changed so as a result the column will be frozen at its initial dimension.

[MartinZikmund]

@michael-hawker @Martin1994 On our side @ramezgerges is now working on adding Header and Footer support here unoplatform/uno#13507

[michael-hawker]

Looks like the PR was merged and the issue closed: unoplatform/uno#10745

Once @Arlodotexe gets Labs up-to-date with our latest changes from the Windows/tooling repos, then we can try the latest Uno version and see how things work with DataTable

[Arlodotexe]

@MartinZikmund You mentioned that this should be fixed under the latest Uno package? If I understand, we won't require the changes in this PR if the package is updated, right?

[MartinZikmund]

@Arlodotexe yes, changes to the PR should not be needed

[Arlodotexe]

Great, thanks @MartinZikmund! Did some testing, looks like DataTable still has a few issues to resolve. I've moved tracking here.