[AutoLayout] Collapsed elements in autolayout still takes space

[Marc-Antoine-Soucy]

Current behavior

You can see this in this gif were you switch visibility between two grids. (AutoLayout to the left, StackPanel to the right)

In this gif, where the blue grid is being collapsed, you can see that it still takes space in the AutoLayout while it doesnt in the StackPanel.

Expected behavior

I would expect collapsed element in an AutoLayout to stop taking space, just like they do in a StackPanel.

How to reproduce it (as minimally and precisely as possible)

	<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
		<utu:AutoLayout>
			<Grid Height="200"
				  Width="200"
				  Background="Blue"
				  Visibility="{Binding Element1Visibility}">
				<TextBlock Text="Grid in Autolayout"
						   VerticalAlignment="Center" />
			</Grid>
			<Grid Height="200"
				  Width="200"
				  Background="Red"
				  Visibility="{Binding Element2Visibility}">
				<TextBlock Text="Grid in Autolayout"
						   VerticalAlignment="Center" />
			</Grid>
		</utu:AutoLayout>
		<StackPanel Margin="200,0,0,0">
			<Grid Height="200"
				  Width="200"
				  Background="Blue"
				  Visibility="{Binding Element1Visibility}">
				<TextBlock Text="Grid in Stackpanel" 
						   VerticalAlignment="Center"/>

			</Grid>
			<Grid Height="200"
				  Width="200"
				  Background="Red"
				  Visibility="{Binding Element2Visibility}">
				<TextBlock Text="Grid in Stackpanel"
						   VerticalAlignment="Center" />
			</Grid>
		</StackPanel>


		<Button Click="Button_Click" 
				Content="Change visibility"/>
	</Grid>

BasicApp.zip
To test, just click on the button and notice the blue grid always takes space in the AutoLayout and does not in the StackPanel.

Nuget Package:

		<PackageReference Include="Uno.Toolkit.WinUI" Version="4.0.0-dev.52" />
		<PackageReference Include="Uno.WinUI" Version="5.0.0-dev.1441" />

Package Version(s):

Affected platform(s):
The bug is present on all platform tested

• WebAssembly
• Android
• iOS
• macOS (AppKit)
• Mac Catalyst
• Skia
  • WPF
  • GTK (Linux)
  • Linux Framebuffer
  • Tizen
• Windows

IDE:

• Visual Studio 2022 17.60
• Visual Studio 2019
• Visual Studio Code
• Visual Studio for Mac
• Rider Windows
• Rider macOS

Relevant plugins:

Anything else we need to know?

[Robert-Louis]

@agneszitte @Marc-Antoine-Soucy it should be fixed by this pr #663