Improved UI for severity details #1672

[Rishi-source]

Fixes : #1672

• [x] For each row, add the actual computed score value before the vector. Otherwise the vector is fairly arcane to make sense of. This should come before the vector

• [x] We need some link to what a vector is for each CVSS for instance https://www.first.org/cvss/ ... better would be a direct link to the vector docs

• [x] It would be great to have a tooltip on hover, using the same values that exists for each parts in https://www.first.org/cvss/calculator/3.1 when hover over them.