Let the result of "self userInterfaceTheme" actually respond to the messages understood by UserInterfaceTheme if those are no properties.
Why? Make the existing use of "self userInterfaceTheme apply" work again.
=============== Diff against System-dtl.979 ===============
Item was changed:
----- Method: UserInterfaceThemeRequest>>doesNotUnderstand: (in category 'lookup') -----
"Look up the visual-attribute specified by aMessage's #selector in the current theme for the current target object."
Item was removed:
- ----- Method: UserInterfaceThemeRequest>>set:for:to: (in category 'accessing') -----
- set: propertySymbol for: aClassOrSymbol to: valueObject
- "Where aClass asks its userInterfaceTheme for propertySymbol, provide valueObject. Pass this on to the actual theme"
- ^self theme set: propertySymbol for: aClassOrSymbol to: valueObject