Fix for FFH cases where event is split in multi tabs by age category

[jodwd]

For example http://scoresheet.ffhaltero.fr/scoresheet/competition/view/6705 Tested (only) for this comp and managed to get results of the 4 lifters in the 3 tables

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.97%. Comparing base (57fb197) to head (dbf2c1b).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #308 +/- ## ============================================ Coverage 81.97% 81.97% ============================================ Files 17 17 Lines 527 527 Branches 4 4 ============================================ Hits 432 432 Misses 83 83 Partials 12 12 ```

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