fix: UI overridden margin in derived controls being reset

[Basewq]

PR Details

As per #2048, Margin is a struct Thickness, with itself holding float fields (Left, Right, etc).
If an object has a Thickness struct as a field/property and you override it in a derived asset, it is marked as overridden, however the fields of the Thickness are not marked overridden.
When AssetPropertyGraph encounters the Thickness's fields it was not aware its parent has been marked overridden so it mistaken itself as not overridden and overwrites itself with the value from the base asset.

This change ensures any encountered member (field/property) that is a value type must check if it is part of another value type that may be marked overridden, and reject taking the base asset's value if this is the case.

2nd commit is to fix some typos.

Related Issue

Fixes #2048

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• 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.
• All new and existing tests passed.
• I have built and run the editor to try this change out.

[Eideren]

Looks great, thanks !