Sort according to the field in Dependency List

What does this MR do?

Sort according to the field in Dependency List

This makes the Dependency List use a more sensible sort order for the chosen sort field. Specifically, sorting by "Component name" or "Packager" should be alphabetical by default (ascending), while sorting by "Severity" should be descending (most severe to least).

Addresses #335066 (closed).

Screenshots or Screencasts (strongly suggested)

Before	After
sorting_before	sorting_after

Does this MR meet the acceptance criteria?

Conformity

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Availability and Testing

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