Grid: Not getting invalidated when changing the Height/Width of Row/ColumnDefinitions declared with the short syntax

Description

When declaring the RowDefinitions of a grid using the short syntax and then changing the Height property of a row, the grid doesn't get invalidated and the change takes effect after some other action invalidates the grid - for example if the window is resized (same for ColumnDefinitions).

Looking at: https://github.com/dotnet/maui/blob/main/src/Controls/src/Core/RowDefinitionCollectionTypeConverter.cs#L31 and https://github.com/dotnet/maui/blob/main/src/Controls/src/Core/DefinitionCollection.cs#L15 the SizeChanged event isn't triggered in this case, whereas adding the rows one by one triggers the SizeChanged event - https://github.com/dotnet/maui/blob/main/src/Controls/src/Core/DefinitionCollection.cs#L21.

I believe we should have the same behavior when using the short syntax for Row/ColumnDefinitions.

Steps to Reproduce

Run the project
Click the Resize button
Observation: The blue row doesn't change its height
Expected: The blue row to increase its height
Comment the first grid with RowDefinitions declared with the short xaml syntax
Uncomment the second grid
Click the Resize button
Observation: The blue row's height is increased as expected

Link to public reproduction project repository

https://github.com/telerik/ms-samples/tree/main/Maui/GridRowsShortSyntaxIssue

Version with bug

9.0.0 GA

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android, Windows, macOS

Affected platform versions

No response

Did you find any workaround?

Call InvalidateMeasure after changing the value of Height/Width of Row/ColumnDefinitions.

Note: This may not fully cover everything that is missing out.

dotnet / maui