Hf/top confidence fix

[brosenberg42]

Issues:

• When selecting detections with the highest confidence, Workflow Manager does not consistently handle detections with equal confidence. #1711

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This change is 

[jrobble]

Good catch on the artifact and ff track uses of top confidence. I like the util.

Reviewed 9 of 9 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @brosenberg42)