wingman caseSplit uses out-of-scope (unqualified) constructors

[aavogt]

import qualified Prelude
f :: Prelude.Maybe a -> ()
f x = _

If I ask for "Wingman: Case split on x" I get:

f Nothing = _wc
f (Just a) = _wd

I think it should have written Prelude.Nothing. If there are multiple module names, it should pick the shortest.

I'm using haskell-language-server version: 1.9.1.0 (GHC: 8.10.7)