Files tab displays wrong document type

[aw-bib]

The files tab of invenio 1.x groups files by the document type configured via CFG_BIBDOCFILE_DOCUMENT_FILE_MANAGER_DOCTYPES. However, for the display constant generated bibdocfile_templates.py does not use the configured display constant, but the internal name.

In stock invenio the internal name for most doctypes matches the display name, so this is not obvious that there is a problem in the display. For join2, however, we added a couple of doctypes where both forms differ, so we stumble upon the issue.