MakeUnrooted doesn't reparent its members

[stephen-hawley]

BaseDeclaration.MakeUnrooted copies members over but doesn't reparent the members in the new class.
This is probably bad.

It can be fixed easily enough, but I don't know how that will affect the rest of the code base, so make sure the tests pass.
Also, if this gets fixed in MakeUnrooted be sure to remove the code in OverrideBuilder which is a patch for that.