Automatically expand and scroll the streams tree when focusing on an item

[abey79]

What

• Follow up to Automatically expand and scroll the blueprint tree when focusing on an item #5482
• Fixes Double-clicking an entity/instance/component anywhere should put it and its ancestors into focus _everywhere_ #5232

This PR adds support for expanding and scrolling to the focus item in the Streams view. It also adds expanding/scrolling the Blueprint tree when focusing on a component.

• Blocked on Fix two ScrollArea bugs: leaking scroll target and broken animation to target offset emilk/egui#4174

TODO:

•  update egui commit once ☝🏻 is merged

focus_scroll_works.mp4

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• I have read and agree to Contributor Guide and the Code of Conduct
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  • Using newly built examples: app.rerun.io
  • Using examples from latest main build: app.rerun.io
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[teh-cmc]

There seem to be issues with the visibility check.

Example here where the time panel won't scroll even though I cannot see the entity:

24-03-14_09.04.15.patched.mp4

(Also I cannot help but notice that there's no selection highlight in the time panel -- wasn't that implemented? I lost track of all the improvements!)

[abey79]

@teh-cmc yeah sorry, this should be marked as draft. There is a bug going on here that I haven't been able to track so far.

Edit: fixed.

And yeah, "sister-selection" is still on the todo list. It will make that focus feature much nicer.

[teh-cmc]

So nice