[Feature Request] : Support for Folders in the Models window.

[lavenderb]

Description

The ability to focus on a single model in the 'Models' window with the 'right arrow' ii very useful, but I often work with a set of models related to a specific project or client. It would be nice to group these models into a 'folder' and then use the arrows to navigate up & down the the folder structure.
A simple enhancement but very useful for organising a large workspace :-)