DJC: Provide new command option on Product to "Improve Packages from latest data"

[DennisClark]

Importing an SBOM into a DejaCode Product can be disappointing if the SBOM does not have much license information. A nice feature would be to provide a new command option to "Improve Packages from PurlDB" on the Product "Scan" dropdown:

Step through the Product Packages
Use the PURL to find an entry in the PurlDB
Apply PurlDB field values to empty fields in the Product Package and corresponding Package definitions.

[DennisClark]

Given our recent experience with importing real-world SBOMs into DejaCode with rather scant license information, I think we should raise the priority on this one.