QE: Change UI element for checking list of salt keys

[vandabarata]

What does this PR change?

There's been a failing test due to a change in the UI component's name, it seems. This fix is meant to fix the test when it runs on the list of keys instead of the systems' list page.

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Fixes #
Tracks # add downstream PR, if any

• DONE

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[vandabarata]

nevermind, just noticed it's still inside the spacewalk-content part, so this isn't the reason for the failure. Closing this for now