Studio: Hide tooltip if the provided text is not available

[ivan-ottinger]

Related issues

• Fixes https://github.com/Automattic/dotcom-forge/issues/10087.

Proposed Changes

• hide tooltip if the provided text is not available

Testing Instructions

1. Check out the PR branch and build the app with npm start.
2. Wait for Studio: Update import/export messaging and tooltips when sync is in progress #717 to be merged.
3. Initiate a sync of one of the connected sites and head over to the Import / Export tab.
4. Hover over the "Drag file" or export button to see the tooltip. Keep the cursor there.
5. As soon as the syncing finishes, the tooltip should disappear automatically.
6. Review other existing Studio app tooltips. There should be no regression.

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[ivan-ottinger]

This PR is ready for review and is easiest to be tested once #717 has been merged.

[wojtekn]

It works as expected, but I needed to rebase this branch on trunk.

[ivan-ottinger]

It works as expected, but I needed to rebase this branch on trunk.

Thanks for the review, Wojtek. Yes, I missed adding that step into the testing instructions.