Re: Minimal patch: Use link face as default for button face

[Richard Stallman]

    As buttons can be defined hierarchically -- a button's behavior is
    (usually) defined by its "button-class", and a button-class can inherit
    from a superclass -- maybe a cleaner way would be to add a standard
    button-class named "link", and make link-like buttons inherit from it.

    Then the "link" button class would use the "link" face by default.

Could you put that in etc/TODO?