feat: Allow Reset Grid Properties for Layout in UI Editor (#1619)

[dloe]

PR Details

Allowing UI grid properties to be reset to base value in UI editor. 'Reset to base value' button by right clicking on properties doesn't allow to be reset.

Related Issue

Issue: https://github.com/stride3d/stride/issues/1619

Types of changes

Just a note: May need a recommendation on where the custom delegate function goes, for now I kept them in UIAssetNodeUpdater file, it may need to be moved elsewhere. I can remove those TODO comments as needed. Thank you!

• [ ] Docs change / refactoring / dependency upgrade
• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [ ] My change requires a change to the documentation.
• [ ] I have added tests to cover my changes.
• [X] All new and existing tests passed.
• [X] I have built and run the editor to try this change out.