Unable to list all tests in the UI

[lampajr]

Describe the bug

After upgrading to Patternfly 5 it looks like arg.cell.value is not a String array anymore but a Set and this is breaking the current frontend preventing to show the list of tests.

error during render TypeError: watching.some is not a function
    at WatchDropdown (AllTests.tsx:80:31)

To Reproduce

1. Create a test
2. Reload the /test/ web page

Version

What is the version of Horreum ?

If you are using a development branch; what is the commit id ?

0.18.x