[BUG] Remove Windows OnLoaded Popup Workaround

[TheCodeTraveler]

Is there an existing issue for this?

• I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

In PR #1470, we added the below work-arounds for Popup on Windows to fix a .NET MAUI bug affecting Popup.

Once the .NET MAUI team has resolved dotnet/maui#12970, we will remove our work-around.

Maui/src/CommunityToolkit.Maui/Views/Popup/PopupExtensions.shared.cs

Lines 24 to 50 in 5a4f7ea

	#if WINDOWS
	// TODO: This is a workaround for https://github.com/dotnet/maui/issues/12970. Remove this `#if Windows` block when the issue is closed
	void handler(object? sender, EventArgs args)
	{
	page.GetCurrentPage().Loaded -= handler;
	CreateAndShowPopup(page, popup);
	}
	page.GetCurrentPage().Loaded += handler;
	#else
	if (page.IsPlatformEnabled)
	{
	CreateAndShowPopup(page, popup);
	}
	else
	{
	void handler(object? sender, EventArgs args)
	{
	page.Loaded -= handler;
	CreateAndShowPopup(page, popup);
	}
	page.Loaded += handler;
	}
	#endif

Maui/src/CommunityToolkit.Maui/Views/Popup/PopupExtensions.shared.cs

Lines 67 to 118 in 5a4f7ea

	#if WINDOWS
	// TODO: This is a workaround for https://github.com/dotnet/maui/issues/12970. Remove this `#if Windows` block when the issue is closed
	var taskCompletionSource = new TaskCompletionSource<object?>();
	async void handler(object? sender, EventArgs args)
	{
	page.GetCurrentPage().Loaded -= handler;
	try
	{
	var result = await CreateAndShowPopupAsync(page, popup);
	taskCompletionSource.TrySetResult(result);
	}
	catch (Exception ex)
	{
	taskCompletionSource.TrySetException(ex);
	}
	}
	page.GetCurrentPage().Loaded += handler;
	return taskCompletionSource.Task;
	#else
	if (page.IsPlatformEnabled)
	{
	return CreateAndShowPopupAsync(page, popup);
	}
	else
	{
	var taskCompletionSource = new TaskCompletionSource<object?>();
	async void handler(object? sender, EventArgs args)
	{
	page.Loaded -= handler;
	try
	{
	var result = await CreateAndShowPopupAsync(page, popup);
	taskCompletionSource.TrySetResult(result);
	}
	catch (Exception ex)
	{
	taskCompletionSource.TrySetException(ex);
	}
	}
	page.Loaded += handler;
	return taskCompletionSource.Task;
	}
	#endif

Expected Behavior

The .NET MAUI team have an open Issue to address this

Steps To Reproduce

N / A

Link to public reproduction project repository

https://github.com/CommunityToolkit/Maui

Environment

- .NET MAUI CommunityToolkit: v6.1.0
- OS: Windows

Anything else?

Adding the blocked label until .NET MAUI Issue dotnet/maui#12970 is resolved