hakanai
Steps to reproduce
==============
  1. Clone project from source control (can give access to GitHub repo if necessary to reproduce)
  2. Open the project in Unity
  3. Open the scene
  4. Click on the main avatar model
  5. In VRC_Avatar Descriptor, set Custom Standing Anims to CustomOverride
Expected: In Hierarchy, scene should get a
next to it to indicate that it has been modified from the saved version
* Actual: In Hierarchy, scene is 'unmodified'
  1. Try to save the scene
* Expected: Scene gets saved
* Actual: Files on disk do not change
  1. Quit Unity and reopen the project again
* Expected: Custom Standing Anims is still set
* Actual: Custom Standing Anims has been set back to None (because it wasn't saved)
Workaround
=========
After making changes to the model at step 5 above, add a cube to the scene and delete it again.
The scene name will now have the * on it, saving will save the Custom Standing Anims and after reopening the project the setting is still there.
Hypothesis
=========
VRChat SDK isn't setting the 'scene modified' flag when properties change in VRC_Avatar Descriptor.
This might also be behind the other problem I an experiencing where the custom animation overrides are not being used, assuming that the plugin might be pulling this from the saved files instead of using the correct in-memory values, but I won't be able to verify for another 8 hours or so.