[ET-2273] Fix show screen options filter in ET

[codingmusician]

🎫 Ticket

ET-2273

🗒️ Description

The screen_options_show_screen filter should always return what is passed into the filter if it doesn't meet the requirements, not change it to false. This was causing Screen Options to not show when not on the Tickets List page, throughout WordPress. Not good.

🎥 Artifacts

Before fix:

After fix:

✔️ Checklist

• Ran npm run changelog to add changelog file(s). More info here
• Code is covered by NEW wpunit or integration tests.
• Code is covered by EXISTING wpunit or integration tests.
• Are all the required tests passing?
• Automated code review comments are addressed.
• Have you added Artifacts?
• Check the base branch for your PR.
• Add your PR to the project board for the release.