Just a question why is BC_ImportDeletedList shown and not BC_ImportALL? Wouldn't it better to import all quarantined and deleted at boot just in case. Another question was what does green check mark on the icon mean? Does it mean file has digital signature and is trusted?

Actually, you're talking about the AVZ parser and I took the same script from the original one. So I'm not able to answer your question...

Regarding the check mark, it means that the checksum of the file is trusted by GSI's database.