refactor(frontend): ignore invalid time units

[eatyourgreens]

When the Time Unit column contains multiple values, prompt the user to pick a single value from a menu.

[sonarcloud[bot]]

Quality Gate passed for 'pkpdapp'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

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

Project coverage is 76.26%. Comparing base (e4b255d) to head (b08ef8d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #501 +/- ## ============================================ Coverage 76.26% 76.26% ============================================ Files 108 108 Lines 5591 5591 ============================================ Hits 4264 4264 Misses 1327 1327 ```

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[sonarcloud[bot]]

Quality Gate passed for 'pkpdapp-team_pkpdapp_frontend'

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud