Fix showing 3D objects in 2D space views without pinhole camera at root

[Wumpf]

What

With the new system for filtering applicable entitites this is actually super easy!
I believe we didn't do this filter before at all, so likely this goes beyond fixing a regression.

• Fixes Bad heuristics for objectron #4689

DRAFT:
Confirm this. Only reproed on the Ci's web build for me!
Doesn't actually work. The problem here is that we try to display something that is under a pinhole inside a 2D spaceview. Almost feels like we want the full space partition here...

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[Wumpf]

@jleibs and me decided to combine with its parent pr