The `use_helpers` method was added in ViewComponent 3.8.0, and it's
included by default in all components since version 3.11.0.
Note we sometimes delegated the `can?` method to the controller instead
of the helpers, for no particularly reason. We're unifying that code as
well.
We were displaying documents in five places, and in five different ways.
Sometimes with the metadata in parenthesis after the title, sometimes
with the metadata below the title, sometimes without metadata, sometimes
with an icon in front of the document, and sometimes with a separate
link to download the file.
So we're now displaying the same thing everywhere. Not sure whether this
is the best solution, but at least it's consistent.
We aren't unifying the way we display a list of documents, though, since
different sections look pretty different and I'm not sure whether the
same style would look well everywhere.
Note that we're renaming the `document` HTML class in the documents
table to `document-row` so the styles for the `document` class don't
apply here.
This way it'll be easier to change them.
Note that there were two `.document-link` elements which aren't part of
a `.documents` element. We're renaming the HTML class of the link in
investments because it didn't contain links to download documents and
are slightly duplicating the CSS in the poll answer documents in order
to keep the `word-wrap` property.
