[display] inconsistent go to definition behavior with `import as`

```haxe
import haxe.Json as Jason;

class Main {
static function main() {
var j:Jason;
Jason;
}
}
```

When invoking go to definition on the type hint, it takes you to the `import` statement. However, when invoking it on the expression in the line below, it takes you to `Json.hx`.

I think the behavior should be consistent here (preferably taking you to the import in both cases).