Change what is displayed as Data Bank vs. Notebook data

As FinBIF user searching data, I want that when selecting data source = Data Bank returns all data from Data Bank and no data from other systems, so that data is what i expect it to be.

Currently primary data bank data appears under system = Notebook.

Discussion: https://luomus-ict.slack.com/archives/C01Q5LZ2DMZ/p1769757587915409