Theme name not match

[samwhelp]

Theme name not match

Fix [index.theme] for [mate desktop / appearance preferences (mate-appearance-properties)] not work.

mate-appearance-properties

• https://github.com/mate-desktop/mate-control-center/blob/master/man/mate-appearance-properties.1
• https://github.com/mate-desktop/mate-control-center/tree/master/capplets/appearance