Organizing Shaders and Folders

I notice Unity's list of shaders and sub-directories are alphabetized but split properly so all the sub-directories appear below all the shaders.



How can I make my shaders and shader dirs do this? When I add directories in ShaderLab, e.g.:

Code (csharp):

1.  
2. Shader "Marmoset/Transparent/Bumped Diffuse IBL" {
3. ...
4. }
5.  

They're all jumbled together:

 

Its seems to work fine here..