Fixing model import scale

[adriengivry]

Description
Importing a model (It seems to be only affecting FBX models) in Overload often result into having big models that needs to get scaled down (to 0.01).

To Reproduce
Steps to reproduce the behavior:

1. Import an FBX
2. Add the FBX to the scene
3. Notice the issue

Expected behavior
FBX models should have a correct scale.

Screenshots

Resources
This can solve the issue: assimp/assimp#2166