Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [ ] Unsafe blocks (if any) have justifying comments
- [ ] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A

I encountered this bug while building my app with GPUI where tooltips
were getting stuck when i move my mouse away from the origin element.

Zed kinda gets away with it because tab close buttons use
`visible_on_hover`, so when the mouse leaves the tab, close button
disappears. This triggers a redraw which makes GPUI recheck and hide the
tooltip.

In the "Before" version i had to trigger the recheck by moving my mouse
over an element with hover styles to make the tooltip disappear.

### Before


https://github.com/user-attachments/assets/f405620f-6d6d-4a24-8992-214180bc7b76

### After


https://github.com/user-attachments/assets/2e41fbca-af61-4f34-bd5d-ab288f34e73a