Improve display of the Severity table of the Essentials screen

[mjherzog]

The Severity table on the Essentials screen is becoming very hard to read with so much data repeated at a row level.
One idea is to add a separate column for each System - Score combination and/or creating System subsections.
Using https://public.vulnerablecode.io/vulnerabilities/VCID-29te-f3et-aaac as an example:

• There are many pairs of numeric and text scores from the same origin (URL). Since the text score is effectively an alias in these cases it would be better to see the cvss.31 and generic_textual values in separate columns on a single row for that origin. This is an extremely common pattern
• With the increase in cvss versions and other systems it might also makes sense to have separate sections for cvss vs. epss especially because these scores are not comparable.

For this particular VCID there are also 15 instances (14 duplicates) for the epss Score