KRACOEUS-8197 Changed visibility of copy link

I don't think this will work because the ProposalDeveloperDocumentAuthorizer has

```
    @Override
    public boolean canCopy(Document document, Person user) {
        return false;
    }
```

And we don't want to change the canCopy because I'm not sure we want copy links in all the places rice might render them.  We may need to create out own separate copy edit mode.