Blender Git Commit Log

Layers doversion: Handle hide and hide_render objects

We now created nested collections for the original Collection 1, 2 ...
collections for the "hide" and "hide_render" objects.

Also, remove logic for rename single-collection files, it's now kept as
it was originally (Collection 1, Collection 5, ...).

Thanks Sergey Sharybin and Pablo Vazquez for patch review and suggestions.