* Add integration test for blendshape sync
* fix: blendshape sync not being processed
This change refactors AnimationDatabase to be part of the same extension
context as the TrackObjectRenames functionality (which is renamed back to
PathMappings). This then allows us to sequence deactivation of this context
to come after blendshape processing completes.
Fixes: #461
CreateAsset, as it turns out, can be extremely slow, particularly when used on Mesh objects.
By adding our generated objects as sub-objects of a container AnimatorController, we can
minimize this overhead.
With this change it is now possible for Menu Installer to specify as its target a menu installed by another Menu Installer, or a submenu thereof. This allows prefabs to inject extension entries into other prefab menus.
