Undo change to script evaluation, originally made to support <active> + 'giveFocus'; alternate approach to making 'giveFocus' work in dynamic code generatione

type r1 = {A : string, B : string}
type r2 = {B : string, A : string}

val show_r1 : show r1 = mkShow (fn r => r.A ^ "+" ^ r.B)
val show_r2 : show r2 = _