Fix tooltips sometimes being way too big

[emilk]

Related

• Better version of Fix data_label growing the tooltip to potentially infinite width #11187
• Add ui.sanity_check hook-in emilk/egui#7537
• See Slack thread

What

During a egui sizing pass, we allow widgets to inform the parent ui how large they would like to be.
Unfortunately this meant that tooltips could grow without bounds.
This PR fixes this.

To help debug this now and in the future I added ui.sanity_check(); calls here and there.
The plan is to remove those explicit calls in the future and have egui call that for us instead:

• Add ui.sanity_check hook-in emilk/egui#7537

[github-actions]

Web viewer built successfully.

Result	Commit	Link	Manifest
✅	e8d05e3	https://rerun.io/viewer/pr/11190	+nightly +main

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[abey79]

lgtm. would be great to have a snapshot test or two if it's easy enough.

[grtlr]

I was able to cause a panic on this branch. It happens when hovering over the pointcloud entity in autoware_all_sensors.mcap.

Does this need another branch to run?

I can provide the backtrace in a bit.

[emilk]

So sometimes tooltips with ListItems in them will still be larger (by 100-150 points) than the set tooltip_width, because of complicated layout reasons.

The proper fix will have to wait (maybe after Lucas finishes up all the “intrinsic size” work in egui),
so I’ll just increate the threshold (by 10x) before we panic, for now. It only panics in debug builds btw.