Extra-metadata is confusing for :refer completion

[Deraen]

For many results in :refer completion the var is not yet required and metadata can be retrieved. This makes the results a bit confusing as some results might show arglists while others don't.

Perhaps when :refer completion is used no extra-metadata should be added to any candidates?

[alexander-yakushev]

While it's inconvenient that we only see few of arglists/tags in this case, I don't think removing them too would help. And it's not only extra-metadata issue, but also tagging issue in general.