mred:add-preference-panel

• (mred:add-preference-panel name f) -> void
      name : string
      f : a function that accepts a mred:panel% to be used as the parent panel, and returns a panel to be inserted into the preferences dialog

  (mred:add-preference-panel) adds the result of f with name name to the preferences dialog box. f should be a class that inheirits from mred:panel%.