EditorConfig UI 'place open brace *' options are not working

[Youssef1313]

1. Create a new project
2. Add EditorConfig file
3. Open it using EditorConfig UI
4. In Whitespace tab, modify any "place open brace on ..." option. Nothing gets saved.

Other options are working properly, so I think this is not duplicate of #54556

[Youssef1313]

This applies to insert spaces within parentheses of options as well.

[Youssef1313]

What is special about the options that don't work is they use this overload of editorconfig location:

roslyn/src/Workspaces/SharedUtilitiesAndExtensions/Compiler/Core/Options/EditorConfig/EditorConfigStorageLocation`1.cs

Lines 40 to 47 in 843f8db

	public EditorConfigStorageLocation(string keyName, Func<string, Optional<T>> parseValue, Func<OptionSet, string> getEditorConfigStringForValue)
	: this(keyName, parseValue, (value, optionSet) => getEditorConfigStringForValue(optionSet))
	{
	if (getEditorConfigStringForValue == null)
	{
	throw new ArgumentNullException(nameof(getEditorConfigStringForValue));
	}
	}