BLAST: recognition of big databases divided into parts

BLAST database is a set of files with the following extensions: .nhr, .nin, .nsq (.phr, .pin, .psq for a protein database).

But if a database is big then its .nsq file is not one file, but a set of files with the names: db_name.01.nsq, db_name.02.nsq, .... This situation is not supported by UGENE. Support it for all cases of BLAST databases using in UGENE:

1. Query with BLAST.
2. Query with BLAST+.
3. Fetch sequences from local BLAST database.
   Also, check that it works well in Workflow Designer.