Hi, I would like to submit this .cs for Squeak3.8. It does two things:
The fist one are changes to the Preferences related classes in order to support non-boolean preferences. For an example of a non-boolean preference think in the 'Halo Theme' choice in the Halos preference category. This preference were before hardcoded, but now is just another Preference instance with its own view.
The second group of changes are a decoupling of the preference view (the morphic button which is used in the panel) from the preference instance. Now a boolean preference has a BooleanPreferenceView and the halo theme preference has a HaloThemePreferenceView.
More info is in the preamble and in the class comments. Take into account that this .cs is required to load the last version of PreferenceBrowser (which a second ago I published).
Oh. I tested it in Squeak3.8-unstable-6262.
Regards, Hernán