Viewer should sort checks alphabetically within threat categories

[pnacht]

The viewer currently displays checks sorted by threat level ("Dangerous", "High", "Medium", "Low"), with all the inconclusive (-1) checks at the bottom. However, the order within each category is seemingly random.

https://securityscorecards.dev/viewer/?uri=github.com/ossf/scorecard shows the first three High checks as:

• Vulnerabilities
• Signed-Releases
• Token-Permissions

However, for https://securityscorecards.dev/viewer/?uri=github.com/ossf%2Fscorecard-action, the first three High checks are:

• Token-Permissions
• Binary-Artifacts
• Code-Review

I'm in favor of sorting by threat level and of moving the inconclusive checks to the bottom. However, checks within a threat category should be displayed alphabetically.