Allow Custom Widgets to be organised in Groups

[Philip]

It is currently possible to organise Flows in Groups. This makes it much easier to keep things tidy when you have a lot of Flows.

Would it be possible to allow the same thing for Custom Widgets? (e.g. I could put all my Widgets that set different sound profiles into a "Sounds" group, rather than just having a single monolithic list of all my Widgets).