Auto extend import list in some needless cases

[berberman]

Your environment

Output of haskell-language-server --probe-tools or haskell-language-server-wrapper --probe-tools:

haskell-language-server version: 0.9.0.0 (GHC: 8.10.3) (PATH: /home/berberman/.cabal/store/ghc-8.10.3/haskell-language-server-0.9.0.0-8f2c9238aa6456c28366c2c5b74966c6998aac099da88e4737c3be342793b2b1/bin/haskell-language-server)
Tool versions found on the $PATH
cabal:          3.2.0.0
stack:          Not found
ghc:            8.10.3

Which lsp-client do you use:
vscode

Steps to reproduce

Create B.hs:

module B where

data K = K

Re-export B in A.hs:

module A (module B) where

import B

Then import A in Test.hs (the import declaration of module B is prior to that of module A):

module Test where

import B ()
import A

foo = _

Type K in the type hole.

Expected behaviour

K has already been brought into scope by A, so we don't need extend the import list of B.

module Test where

import B ()
import A

foo = K

Actual behaviour

Extra information

The same thing happens to Prelude as well: