Accessibility (and cypress test) issue with empty category on Operator Hub page

Description of problem:

When running the cypress test "developer-catalog-details.feature" the tests tries to install the Serverless operator and fails because the Operator Hub page contains an accessibility issue.

Prerequisites (if any, like setup, operators/versions):

None

Steps to Reproduce

1. Run the cypress test "developer-catalog-details.feature"
2. Or open the Operator Hub page with the Firefox axe - Web Accessibility Testing extension

Actual results:

1. cypress test fails with an a11y issue. See attached screenshot.
2. axe tests shows similar error (and some others as well). See also attached screenshot.

Expected results:

1. cypress tests runs successfully
2. Mentioned axe doesn't show this error

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

• On 4.6 is the "hidden" category (an empty string) is selectable.
• Since 4.7 is the hidden category (empty string) is not selectable anymore.

Additional info:

None