Fluidize *pp-...*, i.e. *pp-default-as-code?*,...

Fluidize *pp-...*, i.e. *pp-default-as-code?*,...

... *pp-named-lambda->define?*,
    *pp-primitives-by-name*,
    *pp-uninterned-symbols-by-name*,
    *pp-no-highlights?*,
    *pp-save-vertical-space?*,
    *pp-lists-as-tables?*,
    *pp-forced-x-size*,
    *pp-avoid-circularity?*,
    *pp-auto-highlighter*, and
    *pp-arity-dispatched-procedure-style*.