A way to logically group projects:
* Centralized at server so all clients have same grouping
* Only needs to be available at the top level project space. No need to mess with branches
* Linking a grouped project in favorites would not need to make all projects in that group part of favorites.
* Grouping would only be visible to users that had access to at least one of the grouped projects
* A project could be grouped to different groupings. Groupings are just a way to link separate projects together.