Fixes to hash functions for lists

[hulpke]

Limit scope of list hashing to permutations acting by permuting, thus avoiding problems when acting with matrices on lists of vectors. This fixes #5786

Also acknowledge, in test, related error reported in support, that already had been fixed in master

[dimpase]

OK, this fixes #5786
I tried to run

gg:=SpecialUnitaryGroup(4,2);
hl:=Z(2)*[
          [0,0,1,0],
          [1,1,0,0],
          [0,1,0,1],
          [0,1,1,0],
          [1,1,0,1]];
o216:=Orbit(gg,Set(hl),OnSets);

which passes with this PR, and fails without.
Should we add this piece to the tests?

PS. Oh, it's there already. Sorry for noise. All good.

[dimpase]

if there is a "rule" that there should be no spaces around <> then it's inconsistently applied in this patch.