Detect data import wildcards (X (..)) as imported

Consider the following Curry modules:

```haskell
-- A.curry
module A where

data X = X { unX :: Int }
```

```haskell
-- B.curry
module B where

import A (X (..))

test :: Int
test = _
```

Entering `unX` at `_` currently suggests an auto-import, even though it is not required.