[reports][js] Fix empty values in tables for experiments with changed aliases

Jaden DIEFENBAUGHrequested to merge
526-report-alias-table-numbers into master

There are 3 different ways an experiment can be indexed in the report's tables data:

  • experiment name
  • experiment alias
  • last segment of experiment name

The last case wasn't being accounted for, resulting in blank values in reports' tables under specific conditions.

Closes #526

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