The previous code immediately dropped identity overrides, even if there still was an interpolation to be done.
Also a little bit of cleanup, and setting an appropriate identity default for the scale property when interpolating.
For modders: As a workaround, you can add a tiny offset so that overrides aren't identity overrides.
* Fix attachments lagging behind their parents (#14818)
* Fix animation blending (#14817)
* Bring back cool guy as another .x smoke test
* Add .x mesh loader unittest
* Do bounding box & matrix calculation at proper point in time
* Remove obsolete `SAnimatedMesh`
* Add "lava flan" (.x model) smoke test
* Fix double finalize in `.x` mesh loader
* Use reserve instead of resize again
The weights are added indirectly via `AnimatedMesh->addWeight`
