pretty_const: proper local name space; tuned;

collect the names from goals in favor of fragile exports

compile

tuning

avoid legacy syntax

further improved fine point w.r.t. replaying in the presence of chained facts and a non-empty meta-quantifier prefix + avoid printing internal names in backquotes

added "!=" (disequality) as a TPTP binary operator, since it pops up in LEO-II proofs

merged

tuned signature;

produce nodes_status outside GUI thread, to avoid a few milliseconds of blocking;