fix randomize settings

[telephon]

This has been around for a long time, @adcxyz could you check?

[adcxyz]

As is, this seems to revert a lot of newer code - maybe it needs to be rebased first?
I am not sure what the specific section that is supposed to fix randomizing.
There is a newer fix to one conceptual error in setRand, which this PR reverts
(this one keeps arrays as param values intact):

	-	proxy.set(*this.randSet(rand, startSet, except, seed).flatten(1));
	+      proxy.set(*this.randSet(rand, startSet, except, seed).flat);	

[adcxyz]

I looked again, and I don't find any functional improvement here,
but lots of unintended reverts.
@telephon, if you like, please rebase and check if you see any useful changes remaining.
If not, we can just drop this one.

[telephon]

I don't see – onto what branch you want me to rebase? It is on main already.