Instability caused by ApplyImpulse

[bluesillybeard]

BodyReference.ApplyImpulse causes instability and weird behavior, specifically when the impulse moves the body into other bodies.

I believe the unstable nature of these methods should at least be noted in their documentation, to avoid confusion.
The easy workaround is to use PoseIntegratorCallbacks instead.

[bluesillybeard]

Turns out, I made a mistake, both methods work perfectly fine.