Remove deprecated sigla from search and autocomplete

[HirschSt]

we have these sigla only for backward compatibility with some old catalogues, so it might be usefull to remove them from search and autocomplete. One idea is to mark them with wf_stage or wf_audit

[ahankinson]

Will there still be a reference or a pointer to the new one? Sometimes people have documentation (a printed book or journal article) with the old one, so it would be good if we could keep the reference and point to the new one.