[Feature Request] Cryptomatte for Foliage

Cryptomatte implementation only looks at the HActor hitproxy type which is a different type than ISMs which use HInstancedStaticMeshInstance.

1. Enable the Movie Render Queue plugin.
2. Install Nuke and the Cryptomatte plugin for Nuke
4. Add the Object Id(Limited) setting
5. Delete the .jpg output and add .exr
6. Add some foliage to the level, save the level
3. Create an empty level sequence, add it to the MRQ Queue
7. Render with MRQ
8. Take the EXR into Nuke and attach it to a Cryptomatte Node
9. Note that the foliage shows up as 'default' if you were to id-pick it with Cryptomatte and that individual foliage instances aren't separated out