add test and prevent null values on task name setup

[CollinBeczak]

Resolves: https://github.com/maproulette/maproulette3/issues/1761

Also added test for confirmation and to prevent regressions:

Test results before the change:

Key takeaways:

[sonarcloud[bot]]

Quality Gate passed

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